In chickens, the presence of feathers on the legs is due to a dominant allele (F),...

In chickens, the presence of feathers on the legs is due to a dominant allele (F), and the absence of leg feathers is due to a recessive allele (f). The comb on the top of the head can be either pea-shaped, a phenotype that is controlled by a dominant allele (P), or a single comb controlled by a recessive allele (p). The two genes assort independently.

Assume that a pure-breeding rooster that has feathered legs and a single comb is crossed with a pure-breeding hen that has no leg feathers and a pea-shaped comb. The F1 are crossed to produce the F2. Among the resulting F2, however, only birds with a single comb and feathered legs are allowed to mate. These chickens mate at random to produce F3 progeny.

What is the expected phenotype ratio for the resulting F3 progeny? Express your answer as two numbers separated by colon.

feathered legs and single comb : no leg feathers and single comb =

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Expert Solution

gladiator answered 1 year ago

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