You are always very helpful. Lots of people on the 23andme forums should discover your channel. I still think the woman in the old RV looks a lot like you.
I have what I deduce (per your X-match explanation) to be a Paternal half sister DNA match on MyHeritage. We are both adopted, so the match brought no new information to the table for either of us. MyHeritage states that our connection could be other relationships, such as Aunt, Uncle, Grandchildren, Grandparents, Niece, Nephew. Match is 29.0% (2,053.4 cM) Shared DNA, 35 Shared segments, 153.9 cM Largest segment. We are a full match on the X on GEDmatch. Am I wrong in assuming that the X-match would look different for those other possible relationships by comparison with a Paternal half Sister?
I have two brothers. Since my S chromosome came 100% from my mother, as did my brothers, then all of our X chromosome are exactly the same. Theoretically, of course.
Not likely. Your mother's X chromosome went through a recombination event so that it was a combination of both her mother and father's X chromosome. Most likely, you and your brother's X chromosomes are combinations of different segments of your maternal grandparents X chromosome. The example I used showed me and my three brother's X chromosomes. You can see that they are all different. Now, it is possible that no recombination happened for you and your brothers. From the data I have collected, 0 recombinations happen 9% of the time. You need to divide that by 2 since there is the possibility of either of your grandparents chromosome. And then multiply it by itself two more times for your two brothers. Which makes the chance of you and your brothers all having the same chromosome around 0.01%. So while small, it is still large enough that there are bound to be some families out there that have this exact case. If your brothers have tested, you may be one in a million!
Hi! Excellent video! I have a question. What means if you see a brother and sister, with almost no red zones, but just a sucession of many green bars separated by some yelow ones? Thank you very much.
First of all, thank you so much for this informative video. I thought I had found my paternal half-sister. The blue line is not solid all the way across. There is a small segment right in the middle that is black with a tiny yellow line. Also, my paternal uncle shows a lot of solid blue lines intermixed with larger black segments x 3. Of interest, it appears the small black segment in the middle with the tiny yellow line is the same for my paternal half-sister and my paternal uncle. (I hope this makes sense). Thoughts? Guidance? Any would be greatly appreciated.
Same situation for me. We share 2099 cM. I’m not sure if she’s my sister or aunt. If the blue line does not go all the way across does that mean she’s my aunt?
In the new Gedmatch all X comparisons will have a small break In the middle. Check the box at the bottom of the form that says Prevent Hard Breaks (etc) to get rid of that little black box.
I am a carrier for Fragile X Syndrome,my oldest son is considered " moderately mentally retarded" and at 37 is like a 6yr old fir the most part. Hes considered very high up in the scales,compared to other nen with FXS. I was curious about anything you could tell me about FXS. My sisters wont get tested,but IF we have the same Dad,they HAVE to be carriers as well. Everybody knows about Autism,yet most have never heard if Fragile X. Yet it is the most common form a genetic mentally retardation and I believe its over 60% ir more ppl with FXS are Autistic as well. My Dad died 26yrs ago and was never tested.
I'm looking for my paternal grandmother. I'm going to ask my sister if she will test at 23andMe. If she will what should I look for after her results come back?
I am trying to work out why I don't have a full match on the bottom (blue line) with my mother or my sister. My sister has a full blue line when compared to mum but I don't? I have a black segment with a fine yellow line in it. This is right at the join between the two parts of the chromosome. We are full sisters and I am the oldest by 2 years. My sister and I don't have a full match either. Again my blue line has a black segment in the middle around the joining ends of each part of the chromosome.
Glad I found your channel. I’m trying to understand the graph for my Gedmatch account result. Specific to a probable half sister same father. By your video the entire X bar should be a solid blue confirming we share same father. I also have a first cousin on mother’s side that has 1553 cM across 55 segments. I’m 99.9% sure my father isn’t hers. Could this high cM be due to our mothers as sisters shared so much of the same mitochondrial dna? Thank you for providing such clear explanations to those of not in field of genetic study.
Mitochondrial DNA doesn't count in the cM amount. Mitochondrial DNA is so small (about 16,000 base pairs) compared to the smallest chromosome (which is tens of millions of base pairs) that it wouldn't add significantly to your overall genome if it was counted.
Thank you for your explanation. Could my scenario be attributed as daughters of two sisters We share a high% of the same autosomal DNA that both our mothers carry? Their DNA being genetically very similar (but not identical as twins) causes my first cousin and I to show as half- siblings?
Hi, I don't know if you remember me. I commented on a previous video by saying that this lady is coming as my first cousin on 23andMe, and as my dad's half sister. Specifically, it says that my dad & this lady have 22.9% of the same DNA and it shows on his chromosomes what DNA segments they have in common (it was nearly every chromosome, even if there was just a small location) One chromosome was entirely half-shared, in fact. What is the probability that they are half siblings? I remember you saying that technically it's possible but really improbable to inherit so much DNA from a distant relative, and that it's more probable that she is my half aunt that I never knew about. I'm writing this because I just found out now what the exact percentage DNA similarly is. It's just that as far as I knew this situation would be impossible
I remember. Probability it is your half aunt (your dad's half sister), greater than 95%. With that much shared DNA, there are only a few relationships that it could be, and two of them are grandparent or grandchild. Which leaves aunt or half sibling. My guess is that the ages probably preclude her from being your Dad's aunt. I think you may have uncovered a family secret.
I'm not sure on the odds, I would have to do some number crunching based on some of the data I have gathered. So if they are a half match on the X (because they got the one of their X from their common father), that would mean that they would have to have inherited different X chromosomes from their mother. About 8% of X chromosomes are passed on unrecombined to their daughters, so to have two would be 8%*8%=0.64%. Roughly the same odds and having 7 children and all of them being girls (or boys). It is rare, but with the number of people in the world, you probably know someone who this is the case.
Hi, I'm trying to find my Half-Aunts biological father. My Aunt has 2 close DNA matches on GEDMatch, A Man who shares 514cM with my Aunt with no X-Match and his full sister who shares 349cM with my Aunt and is also an X-Match = 69.2 cM (36.405 Pct). Through looking at the shared DNA and speaking with them I think the most likely relation is either Half-first Cousin or 1st Cousin once removed, with their paternal Grandmother either being my Aunts Grandmother or Aunt. I don't really understand X-Matches all that well and I was wondering what your thoughts were as the X-Match, It seems pretty high considering that the 2 siblings X-Match is = 86.1 cM (45.349 Pct) only 16.9 cM higher than my Aunt. Does this make it more likely that they're half-Cousins to my Aunt or does it not make a difference and it's still equally possible that they're 1st Cousins once removed? Thanks, Paul
The amount of X-DNA shared isn't so important (because recombination happens randomly). That they share X-DNA is important because it narrows down the list of possible people they could be related to: ruclips.net/video/Cl2pJrLwbVU/видео.html
My full sister Rhonda,according to the 23&Me DNA test shares 48.6% of my DNA.I wonder if she had been born a male instead of a female,would that probably make her DNA sharing with her exactly 50%,or perhaps even a little higher?Because,if she had been born a male,then she would be XY just like me,sharing the male Y chromosome with me,in contrast to the XX chromosome pattern of females.Am I correct?
The percentages can be a little tricky. For instance, my wife and her brother share 42.7% of DNA at 23andMe. They share 2440 cM which is in the range that Blaine Bettinger has in his shared cM Project. On the other hand, I share 53% with one brother, 50% with another brother, and 47% with a third brother. All of these are within the expected range. Parents and children are the only relationship that shares exactly 50% of their autosomal DNA. All of the other percentages are averages for the population but individually they can vary, so for instance siblings can share between 45% and 55% of autosomal DNA.
@@FamilyHistoryFanatics sounds about right. seem like parents should always be 50% since you come directly for them but with siblings it wouldn't always be 50%. IT could be more or less since siblings inherent different genes form the parents.
I have a question. I have 16.2% Iberian,and yet I found one Spanish in the 1500’s and one Portuguese in the 1400’s. The rest of the names are French. My understanding is that 16.2% is around a great grand parent. So how could I have 16.2% Iberian from two grand parents from the 1500’s and 1400’s. Thx - Dan
Actually, your understanding that 16.2% is great grand parent is inaccurate. Check out this video: How many generations back is 3% ethnicity in your DNA test results? ruclips.net/video/9hbE4Vihf4g/видео.html And this one: How Far Back is 3% Ethnicity? [Part 2] Multiple Ancestors In the Result ruclips.net/video/gThnugZcEUc/видео.html
Andy, thx for getting back to me. However, I still don’t understand how I can have 16.2% Iberian with one person from Spain in the 1500’s and one person from the 1400’s. FYI, My family tree right now goes back to the 1400’s. Thx Andy. - Dan
Quick question for you... if a sister and brother are full siblings from the same mother and father how much of the x chromosome should they share ?? Thanks
Sister and brother (or brothers) could share anything from nothing on the X chromosome to a complete half matched X chromosome. Sisters will always share at least a complete half match and likely some full match.
Uncle and nephew (through uncle's sister) could share the same as a sister/brother. Uncle/Aunt and nephew (through the uncle/aunt's brother) would share no X chromosome, because the nephew received an X chromosome from his mother.
Thank you for the reply , ok I've something that I'm confused about myself ,my brother and my son done 23 and me ... myself and my brother only match a little on the x chromosome but are full brother and sister .... myself and my son match on the whole chromosome.... my son and my brother( his uncle ) match on the exact same bit and amount of chromosome x ..As I do with my brother .... 31.6 cms is the amount . Also 23 and me are showing DNA matches for my brother but they aren't showing related to me and also some are more related to him then me ... Also the same thing is happening with me and my son ... people who are related to him that are also related to others I'm related to are not showing as related to me .. And I also have some DNA matches who are not showing as matched with my son ( even though he is my biological son ) Do you have any clue why that would happen ?
What you are seeing with the X chromosome between yourself, your brother, and your son is exactly what I described. When it comes to matches, once you get past 2nd cousins (i.e. less than about 150 cM) you can have matches that match your brother but not you and match you but not your brother. You will have half of your matches that match you but not your son, because your son only received half of your DNA. This is all normal. (Albeit a little confusing for genealogists at first, because even though you don't share DNA with people, you can still be related to them).
So I’m female and have 1 full brother and 1 full sister. If we compare our x-chromosomes, we should be able to tell which x strand we girls got from our mother and which came from our father’s mother by figuring which of our x-chromosomes substantially match with our brother. Our other x-chromosome then comes from our paternal grandmother. Right?
When I did an x dna comparison with my sister the graphic showed the blue box under the green and yellow had a black section in the middle. If we were full sisters I would have expected the blue box all the way across? Can you throw some light on this please?
Check your autosomal. If it is above 2200 cM you are full siblings and there is some error in the X data. If you are less than 2000 cM then you are half siblings and share the same mother. If it is between 2000 and 2200cM, then you will probably need more info.
Question not sure if its been asked or answered some where previously? If so sorry in advance. My moms maternal half sister and maternal 1st cousin have both tested on ancestry. I have uploaded both their results onto GEDmatch and FTDNA but I am only showing to be a X match to my moms cousin. Would this be correct or am I missing something ?!? Thanks in Advance for any information!
It is possible, since your mom's half sister would have gotten a different maternal X chromosome recombination than your mom. It all has to do with what segments you actually inherited.
Question for you. My son's father was adopted and I'm trying to locate the paternal grandparents of my son based on an autosomal test - (approx. a 3rd cousin, 108 cM shared DNA match). This cousin and his grandfather also resemble the father of my son quite a bit, it's uncanny. The grandfather of the cousin had only 3 brothers and I suspect one of these brothers is the great grandfather of my son. Is it possible to determine anything more without doing an actual Y DNA test? I mean I know based on geography that this cousin is not related to me, so it has to be from the father's side and not passed through X Dna. I hope I am talking sense.
If you found any other descendants from one of those brothers, that would be helpful. For instance, the grandsons of the 2 brothers who were not your son's great grandfather, should have about the same closeness in shared DNA as the cousin you found. A grandson of your son's great grandfather, should have twice as much. There is a range of possible shared DNA with each relationship and the more distant the relationship, the larger the range and likelihood that it overlaps with other distant relationships (i.e. 3rd cousin and 4th cousin could have the same amount of shared DNA). A Y DNA test will help to narrow the field, but since there are multiple brothers, a Y DNA test wouldn't tell you which one was the great grandfather.
I am wondering if I understand correctly. Since sisters receive 1 of 2 X chromosomes from their mother would that not mean they would stand a 50% chance of receiving the exact same X chromosome or am I just confused?
The two X chromosomes are recombined before being passed on. Sisters will have one X chromosome that is the exact same (from their father), but the X chromosome they receive from their mother will likely not be the same.
Thank you very much. I love your videos. My DNA is in Myheritage and in FTDNA. My daugther has sent her DNA to Myheritage and We are waiting for her results. Should she match with my maternal side more than my paternal line? Excuse my poor English, I am a native Spanish speaker and I am not so fluent in English.
She will match you and her mother equally. Although when it comes to cousin matching, if one side has more people (or more people who have tested) then more of those matches will show up.
Are my two sisters genetically closer to each others than myself (male)? Since they both share the same X from our father ? Are sisters always closer genetically than a brother ?
im trying to figure out the recombination of my Mothers X chromosome? im so confused please help me? my mother has 2 x chromosome one is exactly like her (paternal grandmother's)the other is a mix of whom ?
Incorrect. One is exactly like her father's (which is a recombination of the two her paternal grandmother had). The other is a recombination of the maternal grandparent chromosomes that were passed to her mother.
@devin english think of it this way. The two X chromosomes your mother has were given to her by her mother (your maternal grandmother) and her father (your maternal grandfather). Every time the mother passes the X chromosome it recombines into one (completely random) combination of her mother's X and her father's X. During embryonic development the recombined X is only present for the first 5 - 6 weeks in the womb, and if the father passes his X it stays female, but if the father passes his Y, it becomes male. The female's X always recombines while the male's X stays the same, and through generation after generation it undergoes recombination from the mother's X and father's X.
That would be interesting to see, but I would guess that you wouldn't see much difference from what I am showing in this video. Most likely you would show that you are a half match to all of your brothers (because you received two X chromosomes from your mother, or a complete copy of both of her X chromosomes albeit they may be recombined), but that result is still possible even if you weren't XXX. I'm going to map this out and maybe do a video because it looks interesting. If you and your brothers have tested and have results on GEDmatch let me know.
Male Genes 👦 🧬 X Chromosome: Face & Physique Y Chromosome: Physique Default: Mother’s Face (X Chromosome) Female Genes 👧 🧬 Mother: Face & Physique Father: Face & Physique Usual: Father’s Genes (X Chromosome)
@@FamilyHistoryFanatics Yep, it’s actually quite simple. “Opposite gender genes survive…” (mother-son & father-daughter) “Same gender genes die out…” (mother-daughter & father-son) (Father & Son Never Identical) (Reason: Y Chromosome) “Genes switch gender each generation, only the opposite gender genes survive by default.” (Only X Chromosome switch between both genders weather male or female. Reason for result of default survival.) Male: (female -> male -> female ->…) 👩 X -> 👨 X -> 👩 X -> … X Female: (male -> female -> male ->…) 👨X -> 👩 X -> 👨 X -> … X “In result, the same gender genes die out by default.” (For Females, It depends…) (Only Males carry “Extinct Genes”) (Extinct Genes = Y Chromosome) (Only Y Chromosomes go to males resulting in default extinction.) Possible Extinction: Female 👩 X -> 👩 X -> 👩 X -> … X Default Extinction: Male 👨 Y -> 👨 Y -> 👨 Y -> … Y “Very interesting, isn’t it?” 🤔 🤷🏽♂️ 🧠☝🏽
![Megan Thee Stallion - Neva Play (feat. RM) [Official Video]](http://i.ytimg.com/vi/TpYTyAaTRts/mqdefault.jpg)
You are always very helpful. Lots of people on the 23andme forums should discover your channel. I still think the woman in the old RV looks a lot like you.
Spread the word in the 23andMe forums. They shun self-promotion, so we can't share. SO, grab a link and share for us.
I have what I deduce (per your X-match explanation) to be a Paternal half sister DNA match on MyHeritage. We are both adopted, so the match brought no new information to the table for either of us. MyHeritage states that our connection could be other relationships, such as Aunt, Uncle, Grandchildren, Grandparents, Niece, Nephew. Match is 29.0% (2,053.4 cM) Shared DNA,
35 Shared segments, 153.9 cM Largest segment. We are a full match on the X on GEDmatch. Am I wrong in assuming that the X-match would look different for those other possible relationships by comparison with a Paternal half Sister?
I have two brothers. Since my S chromosome came 100% from my mother, as did my brothers, then all of our X chromosome are exactly the same. Theoretically, of course.
Not likely. Your mother's X chromosome went through a recombination event so that it was a combination of both her mother and father's X chromosome. Most likely, you and your brother's X chromosomes are combinations of different segments of your maternal grandparents X chromosome. The example I used showed me and my three brother's X chromosomes. You can see that they are all different.
Now, it is possible that no recombination happened for you and your brothers. From the data I have collected, 0 recombinations happen 9% of the time. You need to divide that by 2 since there is the possibility of either of your grandparents chromosome. And then multiply it by itself two more times for your two brothers. Which makes the chance of you and your brothers all having the same chromosome around 0.01%. So while small, it is still large enough that there are bound to be some families out there that have this exact case. If your brothers have tested, you may be one in a million!
Hi!
Excellent video!
I have a question.
What means if you see a brother and sister, with almost no red zones, but just a sucession of many green bars separated by some yelow ones?
Thank you very much.
I have a solid blue bar but with one piece of black wat does that mean? Tryna see if we have the same dad. Sister/sister
So, If I have a paternal half sister, will ALL of the chromosomes have a solid blue line? Or is the solid blue line in your example just that?
Also, would I have to upload the Build 37 X Chromosome data to GEDmatch? I've already uploaded the regular Build 37 Autosomal data.
First of all, thank you so much for this informative video.
I thought I had found my paternal half-sister. The blue line is not solid all the way across. There is a small segment right in the middle that is black with a tiny yellow line. Also, my paternal uncle shows a lot of solid blue lines intermixed with larger black segments x 3. Of interest, it appears the small black segment in the middle with the tiny yellow line is the same for my paternal half-sister and my paternal uncle. (I hope this makes sense). Thoughts? Guidance? Any would be greatly appreciated.
Next you should check how much total shared cM you have with the suspected half sibling. Half siblings share between 1400 and 2200 cM.
Same situation for me. We share 2099 cM. I’m not sure if she’s my sister or aunt. If the blue line does not go all the way across does that mean she’s my aunt?
In the new Gedmatch all X comparisons will have a small break In the middle. Check the box at the bottom of the form that says Prevent Hard Breaks (etc) to get rid of that little black box.
I am trying to find my Dad and his side of the Family, your videos are great, but I still do not understand how to figure this out
I am a carrier for Fragile X Syndrome,my oldest son is considered " moderately mentally retarded" and at 37 is like a 6yr old fir the most part. Hes considered very high up in the scales,compared to other nen with FXS. I was curious about anything you could tell me about FXS. My sisters wont get tested,but IF we have the same Dad,they HAVE to be carriers as well. Everybody knows about Autism,yet most have never heard if Fragile X. Yet it is the most common form a genetic mentally retardation and I believe its over 60% ir more ppl with FXS are Autistic as well. My Dad died 26yrs ago and was never tested.
I'm looking for my paternal grandmother. I'm going to ask my sister if she will test at 23andMe. If she will what should I look for after her results come back?
You need a way to separate out your maternal matches. A close relative on your mom's side will help.
I am trying to work out why I don't have a full match on the bottom (blue line) with my mother or my sister. My sister has a full blue line when compared to mum but I don't? I have a black segment with a fine yellow line in it. This is right at the join between the two parts of the chromosome. We are full sisters and I am the oldest by 2 years. My sister and I don't have a full match either. Again my blue line has a black segment in the middle around the joining ends of each part of the chromosome.
Glad I found your channel. I’m trying to understand the graph for my Gedmatch account result. Specific to a probable half sister same father. By your video the entire X bar should be a solid blue confirming we share same father. I also have a first cousin on mother’s side that has 1553 cM across 55 segments. I’m 99.9% sure my father isn’t hers. Could this high cM be due to our mothers as sisters shared so much of the same mitochondrial dna? Thank you for providing such clear explanations to those of not in field of genetic study.
Mitochondrial DNA doesn't count in the cM amount. Mitochondrial DNA is so small (about 16,000 base pairs) compared to the smallest chromosome (which is tens of millions of base pairs) that it wouldn't add significantly to your overall genome if it was counted.
Thank you for your explanation. Could my scenario be attributed as daughters of two sisters
We share a high% of the same autosomal DNA that both our mothers carry? Their DNA being genetically
very similar (but not identical as twins) causes my first cousin and I to show as half- siblings?
Hi, I don't know if you remember me. I commented on a previous video by saying that this lady is coming as my first cousin on 23andMe, and as my dad's half sister. Specifically, it says that my dad & this lady have 22.9% of the same DNA and it shows on his chromosomes what DNA segments they have in common (it was nearly every chromosome, even if there was just a small location) One chromosome was entirely half-shared, in fact. What is the probability that they are half siblings? I remember you saying that technically it's possible but really improbable to inherit so much DNA from a distant relative, and that it's more probable that she is my half aunt that I never knew about. I'm writing this because I just found out now what the exact percentage DNA similarly is. It's just that as far as I knew this situation would be impossible
I remember. Probability it is your half aunt (your dad's half sister), greater than 95%. With that much shared DNA, there are only a few relationships that it could be, and two of them are grandparent or grandchild. Which leaves aunt or half sibling. My guess is that the ages probably preclude her from being your Dad's aunt. I think you may have uncovered a family secret.
just wondering what the odds are that two females can be a complete "half match" on the X but not be half siblings (same father)?
I'm not sure on the odds, I would have to do some number crunching based on some of the data I have gathered. So if they are a half match on the X (because they got the one of their X from their common father), that would mean that they would have to have inherited different X chromosomes from their mother. About 8% of X chromosomes are passed on unrecombined to their daughters, so to have two would be 8%*8%=0.64%. Roughly the same odds and having 7 children and all of them being girls (or boys). It is rare, but with the number of people in the world, you probably know someone who this is the case.
Hi, I'm trying to find my Half-Aunts biological father. My Aunt has 2 close DNA matches on GEDMatch, A Man who shares 514cM with my Aunt with no X-Match and his full sister who shares 349cM with my Aunt and is also an X-Match = 69.2 cM (36.405 Pct). Through looking at the shared DNA and speaking with them I think the most likely relation is either Half-first Cousin or 1st Cousin once removed, with their paternal Grandmother either being my Aunts Grandmother or Aunt. I don't really understand X-Matches all that well and I was wondering what your thoughts were as the X-Match, It seems pretty high considering that the 2 siblings X-Match is = 86.1 cM (45.349 Pct) only 16.9 cM higher than my Aunt. Does this make it more likely that they're half-Cousins to my Aunt or does it not make a difference and it's still equally possible that they're 1st Cousins once removed?
Thanks,
Paul
The amount of X-DNA shared isn't so important (because recombination happens randomly). That they share X-DNA is important because it narrows down the list of possible people they could be related to: ruclips.net/video/Cl2pJrLwbVU/видео.html
My full sister Rhonda,according to the 23&Me DNA test shares 48.6% of my DNA.I wonder if she had been born a male instead of a female,would that probably make her DNA sharing with her exactly 50%,or perhaps even a little higher?Because,if she had been born a male,then she would be XY just like me,sharing the male Y chromosome with me,in contrast to the XX chromosome pattern of females.Am I correct?
The percentages can be a little tricky. For instance, my wife and her brother share 42.7% of DNA at 23andMe. They share 2440 cM which is in the range that Blaine Bettinger has in his shared cM Project. On the other hand, I share 53% with one brother, 50% with another brother, and 47% with a third brother. All of these are within the expected range.
Parents and children are the only relationship that shares exactly 50% of their autosomal DNA. All of the other percentages are averages for the population but individually they can vary, so for instance siblings can share between 45% and 55% of autosomal DNA.
@@FamilyHistoryFanatics sounds about right. seem like parents should always be 50% since you come directly for them but with siblings it wouldn't always be 50%. IT could be more or less since siblings inherent different genes form the parents.
I have a question. I have 16.2% Iberian,and yet I found one Spanish in the 1500’s and one Portuguese in the 1400’s. The rest of the names are French. My understanding is that 16.2% is around a great grand parent. So how could I have 16.2% Iberian from two grand parents from the 1500’s and 1400’s. Thx - Dan
Actually, your understanding that 16.2% is great grand parent is inaccurate.
Check out this video:
How many generations back is 3% ethnicity in your DNA test results? ruclips.net/video/9hbE4Vihf4g/видео.html
And this one:
How Far Back is 3% Ethnicity? [Part 2] Multiple Ancestors In the Result ruclips.net/video/gThnugZcEUc/видео.html
Andy, thx for getting back to me. However, I still don’t understand how I can have 16.2% Iberian with one person from Spain in the 1500’s and one person from the 1400’s. FYI, My family tree right now goes back to the 1400’s. Thx Andy. - Dan
Quick question for you... if a sister and brother are full siblings from the same mother and father how much of the x chromosome should they share ??
Thanks
Also uncle( mothers brother ) and nephew how much would they share ?
Sister and brother (or brothers) could share anything from nothing on the X chromosome to a complete half matched X chromosome. Sisters will always share at least a complete half match and likely some full match.
Uncle and nephew (through uncle's sister) could share the same as a sister/brother. Uncle/Aunt and nephew (through the uncle/aunt's brother) would share no X chromosome, because the nephew received an X chromosome from his mother.
Thank you for the reply , ok I've something that I'm confused about myself ,my brother and my son done 23 and me ... myself and my brother only match a little on the x chromosome but are full brother and sister .... myself and my son match on the whole chromosome.... my son and my brother( his uncle ) match on the exact same bit and amount of chromosome x ..As I do with my brother .... 31.6 cms is the amount .
Also 23 and me are showing DNA matches for my brother but they aren't showing related to me and also some are more related to him then me ...
Also the same thing is happening with me and my son ... people who are related to him that are also related to others I'm related to are not showing as related to me .. And I also have some DNA matches who are not showing as matched with my son ( even though he is my biological son )
Do you have any clue why that would happen ?
What you are seeing with the X chromosome between yourself, your brother, and your son is exactly what I described.
When it comes to matches, once you get past 2nd cousins (i.e. less than about 150 cM) you can have matches that match your brother but not you and match you but not your brother.
You will have half of your matches that match you but not your son, because your son only received half of your DNA.
This is all normal. (Albeit a little confusing for genealogists at first, because even though you don't share DNA with people, you can still be related to them).
So I’m female and have 1 full brother and 1 full sister. If we compare our x-chromosomes, we should be able to tell which x strand we girls got from our mother and which came from our father’s mother by figuring which of our x-chromosomes substantially match with our brother. Our other x-chromosome then comes from our paternal grandmother. Right?
Thank is correct.
When I did an x dna comparison with my sister the graphic showed the blue box under the green and yellow had a black section in the middle. If we were full sisters I would have expected the blue box all the way across? Can you throw some light on this please?
Check your autosomal. If it is above 2200 cM you are full siblings and there is some error in the X data. If you are less than 2000 cM then you are half siblings and share the same mother. If it is between 2000 and 2200cM, then you will probably need more info.
Question not sure if its been asked or answered some where previously? If so sorry in advance. My moms maternal half sister and maternal 1st cousin have both tested on ancestry. I have uploaded both their results onto GEDmatch and FTDNA but I am only showing to be a X match to my moms cousin. Would this be correct or am I missing something ?!? Thanks in Advance for any information!
It is possible, since your mom's half sister would have gotten a different maternal X chromosome recombination than your mom. It all has to do with what segments you actually inherited.
Question for you. My son's father was adopted and I'm trying to locate the paternal grandparents of my son based on an autosomal test - (approx. a 3rd cousin, 108 cM shared DNA match). This cousin and his grandfather also resemble the father of my son quite a bit, it's uncanny. The grandfather of the cousin had only 3 brothers and I suspect one of these brothers is the great grandfather of my son. Is it possible to determine anything more without doing an actual Y DNA test? I mean I know based on geography that this cousin is not related to me, so it has to be from the father's side and not passed through X Dna. I hope I am talking sense.
If you found any other descendants from one of those brothers, that would be helpful. For instance, the grandsons of the 2 brothers who were not your son's great grandfather, should have about the same closeness in shared DNA as the cousin you found. A grandson of your son's great grandfather, should have twice as much. There is a range of possible shared DNA with each relationship and the more distant the relationship, the larger the range and likelihood that it overlaps with other distant relationships (i.e. 3rd cousin and 4th cousin could have the same amount of shared DNA). A Y DNA test will help to narrow the field, but since there are multiple brothers, a Y DNA test wouldn't tell you which one was the great grandfather.
Family History Fanatics great, thank you for that. Makes sense!
I am wondering if I understand correctly. Since sisters receive 1 of 2 X chromosomes from their mother would that not mean they would stand a 50% chance of receiving the exact same X chromosome or am I just confused?
The two X chromosomes are recombined before being passed on. Sisters will have one X chromosome that is the exact same (from their father), but the X chromosome they receive from their mother will likely not be the same.
Thank you very much. I love your videos. My DNA is in Myheritage and in FTDNA. My daugther has sent her DNA to Myheritage and We are waiting for her results. Should she match with my maternal side more than my paternal line? Excuse my poor English, I am a native Spanish speaker and I am not so fluent in English.
She will match you and her mother equally. Although when it comes to cousin matching, if one side has more people (or more people who have tested) then more of those matches will show up.
Are my two sisters genetically closer to each others than myself (male)? Since they both share the same X from our father ? Are sisters always closer genetically than a brother ?
In theory, yes (because they share that X), but the amount of shared DNA can vary quite a bit between siblings.
So is it normal to have a brother and a sister sharing more DNA than 2 sisters ?
im trying to figure out the recombination of my Mothers X chromosome? im so confused please help me? my mother has 2 x chromosome one is exactly like her (paternal grandmother's)the other is a mix of whom ?
Incorrect. One is exactly like her father's (which is a recombination of the two her paternal grandmother had). The other is a recombination of the maternal grandparent chromosomes that were passed to her mother.
@devin english think of it this way. The two X chromosomes your mother has were given to her by her mother (your maternal grandmother) and her father (your maternal grandfather). Every time the mother passes the X chromosome it recombines into one (completely random) combination of her mother's X and her father's X. During embryonic development the recombined X is only present for the first 5 - 6 weeks in the womb, and if the father passes his X it stays female, but if the father passes his Y, it becomes male. The female's X always recombines while the male's X stays the same, and through generation after generation it undergoes recombination from the mother's X and father's X.
I just wonder i am from Sweden but i have xxx syndrom,and i have a Brothers how wode the look🤔
That would be interesting to see, but I would guess that you wouldn't see much difference from what I am showing in this video. Most likely you would show that you are a half match to all of your brothers (because you received two X chromosomes from your mother, or a complete copy of both of her X chromosomes albeit they may be recombined), but that result is still possible even if you weren't XXX. I'm going to map this out and maybe do a video because it looks interesting. If you and your brothers have tested and have results on GEDmatch let me know.
No kidding
Yep. No kidding.
Male Genes 👦 🧬
X Chromosome: Face & Physique
Y Chromosome: Physique
Default: Mother’s Face (X Chromosome)
Female Genes 👧 🧬
Mother: Face & Physique
Father: Face & Physique
Usual: Father’s Genes (X Chromosome)
Not sure I follow, could you explain ...
@@FamilyHistoryFanatics
Yep, it’s actually quite simple.
“Opposite gender genes survive…”
(mother-son & father-daughter)
“Same gender genes die out…”
(mother-daughter & father-son)
(Father & Son Never Identical)
(Reason: Y Chromosome)
“Genes switch gender each generation, only the opposite gender genes survive by default.”
(Only X Chromosome switch between both genders weather male or female. Reason for result of default survival.)
Male: (female -> male -> female ->…)
👩 X -> 👨 X -> 👩 X -> … X
Female: (male -> female -> male ->…)
👨X -> 👩 X -> 👨 X -> … X
“In result, the same gender genes die out by default.”
(For Females, It depends…)
(Only Males carry “Extinct Genes”)
(Extinct Genes = Y Chromosome)
(Only Y Chromosomes go to males resulting in default extinction.)
Possible Extinction: Female
👩 X -> 👩 X -> 👩 X -> … X
Default Extinction: Male
👨 Y -> 👨 Y -> 👨 Y -> … Y
“Very interesting, isn’t it?” 🤔 🤷🏽♂️
🧠☝🏽