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| *Women health>>>Genetic Testing |
Genetic problem please help i have a test tomorrow and i think am gonna fail :(? |
tell me how u would do this problem: Color blindness is a recessive sex linked disorder. so the genotype for that is XcXc for a female and XcY for a male. If they have normal vision, the female can be either homozygous X+X+ (the pluses symbolize that lack of the mutant trait) or heterozygous X+Xc since the colorblindness allele is recessive, the heterozygous phenotype is normal vision. For curly hair, I'm almost positive that is autosomal. So that is the normal CC, Cc, cc being Homozygous curly, heterozygous curly, and straight respectively. Therefore you must perform a punnet square with 2 traits being evaluated. So you man who is colorblind is for sure XcY since he must have at least one colorblindness allele, and he is Cc for hair. The wife is X+Xc since she is a carrier of the allele, and she is cc for hair. I believe you can do the punnet square from there right? You should get a 9:3:3:1 ratio of offspring in F1generation. But this one is different not a 9:3:3:1 model like usual. ok. there would be a 50% chance of colorblindness. and a 75% chance of straight hair. |
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