Pedigrees | Classical genetics | High school biology | Khan Academy

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  • Опубликовано: 7 янв 2025

Комментарии • 195

  • @jaredackley7997
    @jaredackley7997 5 лет назад +1283

    who else has an exam in an hour and is cramming

  • @ItsKruski
    @ItsKruski 3 года назад +48

    I love his hand writing and voice... perfect

  • @pyxidis1632
    @pyxidis1632 3 года назад +456

    6 minutes taught me more than my biology teacher has in 90 minutes

  • @emmanuel_toowavy8282
    @emmanuel_toowavy8282 3 года назад +48

    This 6 minutes video Taught me well more than what my biology teacher would do in 3 hours 😬

  • @xoxoali9070
    @xoxoali9070 6 лет назад +349

    procrastination at its finest

  • @BobsBites
    @BobsBites 6 лет назад +210

    At first I thought it is pedigree for DOG FOOD, but now I know its a lesson.

    • @theorange8755
      @theorange8755 5 лет назад +4

      😂😂😂😂😂

    • @thespectator700
      @thespectator700 4 года назад +2

      lol

    • @lumiere3711
      @lumiere3711 3 года назад +2

      I thought so too but when my prof introduced the lesson I was like why is there circles and squares xD

  • @papupradhan9920
    @papupradhan9920 6 лет назад +66

    I want more on PEDIGREES

  • @legendsthatlast1510
    @legendsthatlast1510 Год назад +5

    God bless you! I could never understand it but you broke this down so well compared to my college textbooks! We do not even currently have a lecture! Taking Biology online was a mistake on my part!

  • @jazzylovesth
    @jazzylovesth 4 года назад +17

    thank you so much! i'm working on homework right now and you explained it very clearly, well done!

  • @14debi59
    @14debi59 3 года назад +4

    English and your explanations are excellent .

  • @Starrymoon_star
    @Starrymoon_star 4 месяца назад

    A 6 min vid explained better than my math teacher in 1 hour thank you so much sir I wish my teacehr was like you much loves and thanks!!🎀🎀🎀

  • @y0utube129
    @y0utube129 2 месяца назад +1

    this helped me in 10 mins instead of lectures for 90 mins

  • @backstreetfan2887
    @backstreetfan2887 3 года назад +8

    I just love hearing Sal teach
    keep up the good work
    thank you for all you do

  • @shiveshsatyakam7468
    @shiveshsatyakam7468 3 года назад

    Bhai bahut aacha bataye hain i clear my concept from 0 to1

  • @sobiakhurram4955
    @sobiakhurram4955 6 лет назад +5

    Mr. Khan you're awesome

  • @beepyho
    @beepyho 2 года назад +1

    Thank you.I'm really sure that I am good enough thanks to you.

  • @iloveyunseomuch
    @iloveyunseomuch Год назад +1

    thank you this explained it so well

  • @gu5ie674
    @gu5ie674 3 года назад +3

    this was amazing thankyou!

  • @shubhchoksi2346
    @shubhchoksi2346 3 года назад +1

    this helped me so much thank you

  • @shagganuereeves158
    @shagganuereeves158 3 года назад +70

    Appreciate this man for teaching us

  • @bobbywang9223
    @bobbywang9223 4 года назад +2

    Thanks for the video 👍

  • @xdrenteria4124
    @xdrenteria4124 5 лет назад +7

    Our teacher made us watch this.

  • @princeicio
    @princeicio 6 лет назад +8

    If both parents are affected by a certain trait, does that mean they're gonna pass on that particular trait to all of their children?

    • @kjhuncho4631
      @kjhuncho4631 6 лет назад +9

      if its recessive , the children might be unaffected

    • @BHOSADIWALLA-o6r
      @BHOSADIWALLA-o6r 5 лет назад +6

      It depends if the parents' trait is heterozygous or not, i.e. if the genotype for the trait is heterozygous then there will be a certain probability wether or not the trait is passed on or not

    • @cakey1668
      @cakey1668 11 месяцев назад

      I think the answer is it depends. I will define 'passing on that particular triat' as 'having same phenotype as parents'.
      If the alelle linking to the trait is autosomal recessive, then yes.
      If the alelle is autosomal dominant:
      -If at least one parent is homozygous dominant then yes.
      -Otheriwise there is a 25% chance that the children have different phenotype than their parents.
      If the alelle is X-linked and dominant:
      -If the mother is homozygous, then yes.
      -Otherwise, all female offsprings will have the same trait as their parents. There is a 50% chance for male offsprings to not express the trait. (75% chance for trait to pass on to children)
      If the alelle is X-linked and recessive, then yes.
      The alelle cannot be Y-linked since the trait affects both parents.
      Please let me know if I'm wrong.
      I know I'm five years late but I just want to answer it

    • @princeicio
      @princeicio 11 месяцев назад

      @@cakey1668 I don't know much about biology or genetics, but thanks for taking the time to enlighten me

    • @cakey1668
      @cakey1668 11 месяцев назад

      @@princeicioI'm glad to be of help!

  • @kundana2005
    @kundana2005 Год назад

    Amazing video, thank you very much!

  • @VaakOfKhorri
    @VaakOfKhorri 3 года назад +3

    01:40 thats what schools dont teach us

  • @fl24476
    @fl24476 Месяц назад

    Maybe someone can answer this question: But then how do you determine whether a trait dominant or recessive and if it’s autosomal or sex-linked?

  • @appreciantinx4214
    @appreciantinx4214 6 лет назад +46

    Pedigree sounds like the dog food

  • @AnnikaBai
    @AnnikaBai Месяц назад

    Can you tell that freckles is autosomal dominant just be looking at the pedigree?

  • @njlaotb3102
    @njlaotb3102 4 года назад +3

    Thanks ❤️

  • @jookie4207
    @jookie4207 2 года назад +12

    Yes, but how can you tell whether the pedigree displays a dominant or recessive allele? You just gave us the answer that it’s dominant but didn’t tell us how.

    • @selenite3890
      @selenite3890 Год назад +1

      it's hard to explain, but you look at the ones that are colored in. generally if there are more that aren't colored in its recessive, but that's not always the case. here, you can tell because the only family where none of the children have freckles is the one where the first generation's daughter doesn't have freckles and in everyone else, freckles are more common.

    • @sukshasakura4997
      @sukshasakura4997 9 месяцев назад +1

      Isn’t because there isn’t carrier ? It’s either affect or unaffected in the dominant while it can be affected, unaffected, and carrier in the Recessive

  • @biochemfusion
    @biochemfusion 7 месяцев назад

    Outstanding sir

  • @Ahmed-bb4yp
    @Ahmed-bb4yp 5 лет назад +8

    How were you able to tell that they are autosomal dominant, and not autosomal recessive?

    • @EdmundDerwent
      @EdmundDerwent 5 лет назад +2

      It is given in the question/statement for the pedigree. You shouldn't be asked to work this out in the question.

    • @PinkamyElectricwala
      @PinkamyElectricwala 4 года назад +5

      That's cause ALL the generations are affected as in if u see an affected individual and then look up to their pedigree the parents are affected so it's a dominant trait

    • @taylornewton5988
      @taylornewton5988 4 года назад

      @@PinkamyElectricwala This pedigree could be showing either a recessive disorder OR a dominant disorder based on my worked solutions?
      For the disease to be recessive the genotypes of generation 1 would be switched with the female being homozygous recessive and the male being heterozygous resulting in a 50% chance of offspring containing the trait. Every affected person would be homozygous recessive and each non affected would be heterozygous (except for II-1 which could be homozygous doinant or heterozygous)

  • @kristallynn1755
    @kristallynn1755 3 года назад

    thank you🙏🏼🙏🏼🙏🏼

  • @sciencenerd7639
    @sciencenerd7639 2 года назад +1

    Very helpful, thanks so much

  • @beamyopinta7893
    @beamyopinta7893 6 лет назад +13

    It's just uploaded after I took Biology exam =-=

  • @slimtuleii
    @slimtuleii 7 месяцев назад

    Thank you so much

  • @GamererrReal
    @GamererrReal 4 года назад +3

    did he say anything about partly filled in shapes?

  • @amerakkari4617
    @amerakkari4617 4 года назад

    استاذ اونلاين خاص لك
    Mathmatics
    Physics
    Biology
    Chemistry

  • @prankie727
    @prankie727 5 лет назад +2

    How u decided having frekel is dominanat

    • @emma-z
      @emma-z 4 года назад +1

      GOOGLE

  • @757_girlt5
    @757_girlt5 3 года назад +1

    Thank u

  • @ccvvs
    @ccvvs Год назад

    for generation 1, how do you know that the male if ff? What if they have the recessive gene of freckles but doesnt appear on their physical appearance

    • @ccvvs
      @ccvvs Год назад

      is*

    • @ShiannaFury
      @ShiannaFury Год назад

      Freckles are a dominant gene, so they’ll always show up whether it’s FF or Ff. The male doesn’t have freckles, so he is homozygous recessive!

  • @kramchancel1266
    @kramchancel1266 2 года назад +3

    bro you guys deserve a Nobel prize

  • @hatichestrange8368
    @hatichestrange8368 6 лет назад +2

    good

  • @foopgallery
    @foopgallery 4 года назад

    You're a god

  • @LiaSueKim
    @LiaSueKim 6 лет назад +9

    is it medicine or biology ?

    • @KeiW_
      @KeiW_ 6 лет назад +7

      I learned this in Biology

    • @LiaSueKim
      @LiaSueKim 6 лет назад +1

      which grade? or college?

    • @papupradhan9920
      @papupradhan9920 6 лет назад +1

      It is modern Genetics

    • @LiaSueKim
      @LiaSueKim 6 лет назад +1

      i asked about level

    • @KeiW_
      @KeiW_ 6 лет назад +3

      10th Grade Biology Honors

  • @austincornelius3172
    @austincornelius3172 4 года назад +2

    who else is currently at an exam and cramming

  • @massive218
    @massive218 6 лет назад +9

    pedicure

  • @frankcao7727
    @frankcao7727 3 года назад

    thanks

  • @Lumenxii
    @Lumenxii 7 месяцев назад

    5:09

  • @الوردةالبيضاء-ف3ع6ت
    @الوردةالبيضاء-ف3ع6ت 6 лет назад +14

    When are you going to put a translation into the Arabic language in your videos

    • @ItsKruski
      @ItsKruski 3 года назад +1

      but if you can speak English why have it in Arabic I understand that the majority could also need it in Arabic

  • @sangita182
    @sangita182 3 года назад +2

    Just Waoooo❤️❤️❤️❤️❤️

  • @wagishasharma2852
    @wagishasharma2852 3 года назад

    What I didn't got in weeks....that I got in just minutes....

  • @biochemfusion
    @biochemfusion 7 месяцев назад

    I've a confusion about offsprings? In this case you've shown 3 offsprings in 1st generation, maximum how many offsprings we can draw???? How to know how many children would be effected and how many would be normal???
    Please do react

  • @bryanfrausto3642
    @bryanfrausto3642 5 лет назад +8

    Blue face baby

    • @Nickiisqueenofrap
      @Nickiisqueenofrap 5 лет назад +1

      Yea aight I'm every woman's fantasies

    • @KhoiTTA
      @KhoiTTA 5 лет назад +2

      Bryan Frausto bust down thotiana

    • @bryanfrausto3642
      @bryanfrausto3642 5 лет назад

      Momma always told me I was going to break hearts stupid don be mad at me

  • @leslynbriones6946
    @leslynbriones6946 3 года назад

    what is teh other genotypes for their offsprings?

  • @_itsjustcat
    @_itsjustcat 4 года назад

    What if both parents show the trait but not all of their offspring show the trait??? Would both of the parents genotypes still be Ff?

  • @srisankalpamishra3006
    @srisankalpamishra3006 4 года назад +1

    Nice!

    • @jbcloak1458
      @jbcloak1458 3 года назад +1

      Keep your comments to yourself I’m trying to learn

    • @srisankalpamishra3006
      @srisankalpamishra3006 3 года назад

      @@jbcloak1458 😅When did I reply to you either😆

    • @pravdahoff1202
      @pravdahoff1202 3 года назад

      @@srisankalpamishra3006 Vik is that you

    • @srisankalpamishra3006
      @srisankalpamishra3006 3 года назад

      @@pravdahoff1202 What does that mean?

    • @pravdahoff1202
      @pravdahoff1202 3 года назад

      @@srisankalpamishra3006 Joe Mama Bruh Sleath 100 Lmao 🤣you 😂🤣

  • @agerncygumbo2419
    @agerncygumbo2419 3 года назад

    finally get it

  • @sherwinthirumavalan2477
    @sherwinthirumavalan2477 6 лет назад +4

    hey

  • @mengenliu3258
    @mengenliu3258 4 года назад

    Isnt this also autosomal recessive

    • @Kryshma
      @Kryshma 4 года назад

      I think this is an autosomal recessive because the fact that in the 2nd generation is Aa in female and aa in male, the 3rd generation should produce atleast one heterozygous offspring. Correct me if I'm wrong.

    • @wumboshorts
      @wumboshorts 11 месяцев назад

      @@Kryshmai went straight to the comments because i thought the same thing-i think it can be either 😂

  • @xlemzy
    @xlemzy 3 года назад +1

    Ah, virtual school

  • @naysathomas1442
    @naysathomas1442 4 года назад +1

    can you do a video on sex linked disorders

  • @wildernesstv4210
    @wildernesstv4210 2 года назад

    It’s funny because I have to learn this in 8th grade

  • @BlackopsUSN
    @BlackopsUSN 3 года назад +1

    I am here because my college professor for bio is terrible

  • @ash-eu3ex
    @ash-eu3ex 3 года назад

    pls tell me what to put in the exam lol i'm dying i've been watcjing this for 30mins and don't even understand a single sh*t

  • @jonno9412
    @jonno9412 2 года назад

    Battlepass

  • @biochemfusion
    @biochemfusion 7 месяцев назад

    Please sir 🙏🙏

  • @fikerabigia
    @fikerabigia Год назад +1

    ion get it

  • @trickyok5101
    @trickyok5101 Год назад

    Final exam in 30 minutes

  • @icampinbushes3672
    @icampinbushes3672 5 лет назад +2

    Who else in Mr.Mclin watching this

  • @samranhaider4815
    @samranhaider4815 Год назад

    Presentation

  • @Ryan-fi2ul
    @Ryan-fi2ul 4 года назад

    neglected to communicate there is a Y chromosome on the males

    • @tomxd7660
      @tomxd7660 Год назад

      That’s only relevant when talking about sex-linked inheritance

  • @kapilsharma-ju3th
    @kapilsharma-ju3th Год назад +1

    Ghanta kuch samajh nahi aaya