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

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Biology

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

Assume that a pure-breeding rooster that has feathered legs and asingle comb is crossed with a pure-breeding hen that has no legfeathers and a pea-shaped comb. The F1 are crossed to produce theF2. Among the resulting F2, however, only birds with a single comband feathered legs are allowed to mate. These chickens mate atrandom to produce F3 progeny.

What is the expected phenotype ratio for the resulting F3progeny? Express your answer as two numbers separated by colon.

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

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