If you’d like to practise the material covered in this video, check out our platform at www.cognitoedu.org - it's totally free, and has been built to make learning and revision as easy as possible. The main features are: - Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown. - Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on. - Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like. - A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts. - A comprehensive bank of past exam papers, organised both by year, and also by topic. Amadeus & Tom
i dont understand how the parents phenotype is AA for normal and aa for muscular when i thought that phenotype is the one with visible characteristics and is the dominant one, so how is the muscular one not AA i just dont get how to determine which ones have capital letters please help my bio test is tomorrow
I have a question, how come you only split the parents' alleles into two gametes and say it is by meiosis even though in meiosis you make 4 sex cells not only two? Except from that great video though.
Its dominant when the condition is unaffected or the condition is not related example; if there was a family who is infected by this kind of cystic fibrosis and someone like john hasnt infected by it ,he is homozygous dominant. But if someone like maddy is a carrier then she is homozygous recessive. Also if someone like alexandra was infected by this condition she is heterozygous
Take the out of Africa theory out of the equation because it is documented that all skin color was in America. And there are American "genetic " relations to oceanic people and Australians. So when it comes to markers, is there a way to tell who passed down that marker, which way it came from? For example, lets say an American has the same marker as an African, how can one tell which way it came from? Was it an American who passed it down to an African via past migration or was it an African who passed it down to an American? Are those markers exact matches or is it just similar to each other and somebody just went on ahead and said this is an African marker or this an American marker and they are genetically ancestral related? Or they saying they are genetically related because of similarities or exact matches? If so, how can they tell who receive what from who?
If you’d like to practise the material covered in this video, check out our platform at www.cognitoedu.org - it's totally free, and has been built to make learning and revision as easy as possible. The main features are:
- Lessons organised by topic, only the lessons relevant to your specific exam board and tier are shown.
- Automatic progress tracking. Progress bars tell you what you’re doing well at, and what you need to spend some time on.
- Practise quizzes so you can test your knowledge. You can quiz yourself on any combination of topics you like.
- A huge number of fully-hinted questions that take you step-by-step through some of the trickiest calculations & concepts.
- A comprehensive bank of past exam papers, organised both by year, and also by topic.
Amadeus & Tom
I’ve literally not looked at my revision guide since finding your channel LOL
fax no printer
@@marinaahhh copy no paste
Use this as a understanding you still read your book
LOL
@@Exothermix LOL
these videos are so easy to understand and are really good in comparison to the revision guides.thank you so much!👍
THE HULK MOUSE I LOVE IT
''muscular mouse'' bro that mouse is on steroids HEELLPPP 😭😭 (love your videos)
Lool
I love these videos, genuine lifesaver. Thank you so much
cap stupid kid
I love this man. My exams tomorrow I’ll come back in a few weeks with my results
what was your results?
I'm so lucky I found this channel.
really helpful and easy to undertand thankss
you literally saved my grades thankyou so much
Every single part of the video is informative 👌
Best part is the way you scaffold ❤
All of a sudden I feel the need to eat a ton of food and sleep a ton
I wish I found you earlier I could have saved days of frustration
Never too late I guess
thanks, that was pretty helpful - especially with the genetic cross diagrams
Glad you liked it! 😊
you are the reason im getting 9s right noW!!
Your videos are so good! Please could you make some A level ones?
hey cognito hope u read , please make a part 2 , with sums , so that we can score well in our exam :)
saved my revision THANK YOU!!!!
Thank you this helped so much!
Proud to be on this channel
its really easy to understand with these videos
Never ever understood this but now I know absolutely everything
Very clear explanation!! Big thanks..
@cognito, can you please do a video on the nitrogen cycle, it would really help
THIS MAN IS A LIFESAVER!❤
wow this video is so helping thanks
Thanks a lot this was really helpful
Really happy to hear it - thanks for your support!
Best part of biology fr
Ah yes, a purple muscular mouse
i dont understand how the parents phenotype is AA for normal and aa for muscular when i thought that phenotype is the one with visible characteristics and is the dominant one, so how is the muscular one not AA i just dont get how to determine which ones have capital letters please help my bio test is tomorrow
The videos are amazing
you said the reccessive genotype is the muscular one, would we be told this in the question?
I have a question, how come you only split the parents' alleles into two gametes and say it is by meiosis even though in meiosis you make 4 sex cells not only two? Except from that great video though.
Thanks!
how do we know that normal mouse is dominant ? like how will i be ure im taking the right one being as dominant?
Its dominant when the condition is unaffected or the condition is not related
example;
if there was a family who is infected by this kind of cystic fibrosis and someone like john hasnt infected by it ,he is homozygous dominant. But if someone like maddy is a carrier then she is homozygous recessive. Also if someone like alexandra was infected by this condition she is heterozygous
@@xlayy_000 if she was a carrier would she not be heterozygous?
Thanks so much!
i love ur videos so much
Saved my exam
thank you!
YOUR VOICE IS AS FRESH AS A CUCUMBER
Brilliant l, huge help, thanks
what exactly is a punnett Square?
Thank you 😊
this is awesome
Take the out of Africa theory out of the equation because it is documented that all skin color was in America. And there are American "genetic " relations to oceanic people and Australians. So when it comes to markers, is there a way to tell who passed down that marker, which way it came from? For example, lets say an American has the same marker as an African, how can one tell which way it came from? Was it an American who passed it down to an African via past migration or was it an African who passed it down to an American? Are those markers exact matches or is it just similar to each other and somebody just went on ahead and said this is an African marker or this an American marker and they are genetically ancestral related? Or they saying they are genetically related because of similarities or exact matches? If so, how can they tell who receive what from who?
Excellent!
can you do dominance and codominance, sex determination and sex linked diseases ?
WAIT 1 QS: how do u know that normal is dominant - AA- and muscular is recessive -aa
theyd give it to you in the question dont worry abt it
@@iconical397lmao im done with gcses
@@Maya__x just finished my mocks 😭😭
anyone else here just cramming for exams
Yea
@@a.m9341 can confirm it worked
Ye
why did my teacher never explain this
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I luv u
im only here for school
I can believe that
@@Cognitoedu 😂dw man I'm purely here because your videos are so entertaining...👀
g
Efficient !
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