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Ok i don't understand this question
Color-blindness is a sex linked recessive trait. A woman who is a carrier for the trait has two boys with a color blind man. What is the probability that both boys are color-blind.
From my own punnet square. I thought that because she is a carrier that she would have a wild type X chromosome and a Xc (recessive carrier chromosome) The man has Xc Y ..
From my punnet square I get that there will be 1/4 of a chance to get Xc Y in the progeny so 25% chance a boy will have this disease.. EK says 50% because the wild type chromosome can also be passed on an Xc to another progeny???
Ends up with 25% as answer since .5 x .5 = .25
Been a while since my genetics class lmao these use to be easy.
Thanks
Color-blindness is a sex linked recessive trait. A woman who is a carrier for the trait has two boys with a color blind man. What is the probability that both boys are color-blind.
From my own punnet square. I thought that because she is a carrier that she would have a wild type X chromosome and a Xc (recessive carrier chromosome) The man has Xc Y ..
From my punnet square I get that there will be 1/4 of a chance to get Xc Y in the progeny so 25% chance a boy will have this disease.. EK says 50% because the wild type chromosome can also be passed on an Xc to another progeny???
Ends up with 25% as answer since .5 x .5 = .25
Been a while since my genetics class lmao these use to be easy.
Thanks