Please help me solve this genetics Q and can you show me the punnet square?
The allele for red coat in cattle is co-dominant with the allele for white coat color. The heterozygous phenotype is roan color. Several roan bulls and roan cows are mated. What are the anticipated genotypes and their expected frequencies? Thank you.
Rr = heterozygous roan
set up your punnets square. ignore the long dash, it’s just that spaces don’t work on Y!A.
———R r
R
r
match the 1st R on the top with the second R on the bottom so it would be RR. then match the 1st R with the 2nd r on the bottom. Rr. do it for the rest.
so the possible phenotypes: 25% RR (homozygous dominant), 50% Rr (Heterozygous), and 25% rr (homozygous recessive)
oh and the punnets square:
——-R——-r
R|–RR-|—Rr-|
r|—Rr–|——rr|
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