Multiple Choice
Refer to the figure of chicken combs.In chickens, when the dominant alleles of the genes for rose comb (R) and pea comb (A) are present together (R_A_) , the result is a bird with a walnut comb.Chickens that are homozygous recessive for both genes produce a single comb.A rose-combed bird is mated with a walnut-combed bird and produces offspring in the proportion 3 walnut : 3 rose : 1 pea : 1 single. 
What were the genotypes of the parents?
A) RRaa and RrAa
B) Rraa and RRAa
C) RRaa and RRAa
D) Rraa and RrAa
E) Rraa and RrAA
Correct Answer:
Verified
Correct Answer:
Verified
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