Answer to Question #278711 in Genetics for wongibe

Question

A rooster with striped feathers and a pink comb is crossed with a hen which has striped

feathers and a pea comb. After many hatching instances, the F1 generation is made up of the

same number of male and female chicks and which present the following phenotypic

proportions:

For the males: 1/4 black striped; 1/4 pink striped; 1/4 pea; 1/4 simply striped.

For the females: 1/8 pink striped; 1/8 walnut striped; 1/8 pea striped; 1/8 simply striped; 1/8

plain walnut; 1/8 plain pink; 1/8 pea and plain; 1/8 simply plain.

What was the genotype of the parents?

Answer 1

Dominance typically occurs when one of the two alleles is non-functional at the molecular level, that is, it is not transcribed or else does not produce a functional protein product. This can be the result of a mutation that alters the DNA sequence of the allele.