In chickens, white plumage dominates over the colored one, the pink-shaped ridge over the leaf-like one.

In chickens, white plumage dominates over the colored one, the pink-shaped ridge over the leaf-like one. Make a task in which you need to determine the possible genotypes and phenotypes of offspring with known genotypes and phenotypes of the parents.

Let’s designate the gene for the white plumage of chickens as C, then the gene that causes the colored plumage will be c. Let us designate the gene for the pink-shaped ridge as P, then the leaf-shaped ridge will be determined by the p gene.

Diheterozygous chickens will be recorded as CcPp. Oh, the plumage will be white, and the combs will be pink in shape.

These chickens will produce four types of eggs – cр, СР, cР, Сp.

Colored leaf-combed males will be CPRP because homozygosity is required for phenotypic realization of these traits. These males will produce one type of sperm – cp.

The offspring from crossing the described hens and roosters will be represented by the following options:

dyed chickens with leaf-shaped scallops (ccpp) – 25%;

white chickens with pink scallops (CcPp) – 25%;

dyed chickens with pink combs (ccPp) – 25%;

white chickens with leaf-shaped scallops (Сcpp) – 25% /

Thus, the probability of a white chick with a pink comb is 25%.