In chickens, black plumage dominates over red. the gene for operatic legs dominates over the naked

In chickens, black plumage dominates over red. the gene for operatic legs dominates over the naked; the gene for the flutter ridge is recessive towards the pink one to determine the genotypes and phenotypes of offspring from mating black chickens with operatic legs and a pink ridge, heterozygous in all traits with a black heterozygous cock with naked nude and a leaf-like crest.

Let’s designate the gene that causes the black plumage of chickens as B, then the gene for red feathers will be b.

Let’s designate the gene that determines the development of plumage of chicken legs as C, then the gene for bare legs will be c.

Let’s designate the gene that leads to the development of the rosy ridge of chickens as E, then the gene for the leaf ridge will be e.

According to the introduced designations, we will write down the genotypes of the parent individuals.

Heterozygous for all traits, black chickens with feathered legs and rosy combs will be ВbСсЕе. They will produce sex cells: ВСЕ, bсе, Все, bСе, bсЕ, ВСе, bСЕ, ВсЕ.

A black heterozygous rooster with bare legs and a leaf-shaped crest will be Вbссее, since homozygosity is a prerequisite for the appearance of bare legs and a leaf-shaped crest. Such a cock will produce sperm Bce and bce.

All possible variants of offspring from crossing the described individuals will look like this:

black chickens with feathered legs and a pink crest (ВВСсЕе, 2ВbСсЕе);

black chickens with bare legs and a leaf-like crest (2 Вbссее, ВВссее);

black chickens with feathered legs and a leaf-shaped crest (2ВbСсее, ВВСсее);

black chickens with bare legs and a pink-shaped crest (2ВbссЕе, ВВссЕе);

ginger chickens with bare legs and a leaf-like crest (bbссее);

ginger chickens with feathered legs and leaf-like crest (bbСсее);

ginger chickens with bare legs and a pink-shaped comb (bbссЕе);

ginger chickens with feathered legs and a pink-shaped crest (bbСсЕе).