To show how inheritance works we can use genetic diagrams and punnet squares. This video explores two examples to demonstrate everything you need know about them!
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
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
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.
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
THE HULK MOUSE I LOVE IT
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Use this as a understanding you still read your book
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hey cognito hope u read , please make a part 2 , with sums , so that we can score well in our exam :)
Very clear explanation!! Big thanks..
thanks, that was pretty helpful - especially with the genetic cross diagrams
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Ah yes, a purple muscular mouse
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@cognito, can you please do a video on the nitrogen cycle, it would really help
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Thanks!
you said the reccessive genotype is the muscular one, would we be told this in the question?
Saved my exam
Never ever understood this but now I know absolutely everything
what exactly is a punnett Square?
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
❤❤
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?
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.
can you do dominance and codominance, sex determination and sex linked diseases ?
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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?
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
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@@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
Efficient !
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I can believe that
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