If you cross white chickens with black chickens, the offspring turns out to be variegated. a) What color of offspring
If you cross white chickens with black chickens, the offspring turns out to be variegated. a) What color of offspring can be expected when crossing a white rooster with a variegated chicken. b) what color of offspring can be expected when crossing a variegated rooster and a variegated hen. What will be the phenotypes of the rooster and chickens?
Based on the condition of the problem, it should be concluded that the inheritance of the plumage color trait in chickens is intermediate, which means the appearance of a third, intermediate in quality trait in heterozygotes compared to homozygotes for the dominant or recessive gene.
Let’s designate the gene that causes the white plumage of chickens as C, then the gene for black plumage will be designated as c, and the genotype of variegated chickens will be written as Cc.
a) The white rooster, according to the introduced designations, will be CC. It will produce spermatozoa of one type – C. Spotted chickens Cc will produce two types of eggs – c and C. The offspring will be represented by two options – white chickens (CC) – 50% and variegated chickens (Cc) – 50%;
b) A variegated rooster and hen – Cc, produce sex cells C and c. The offspring are represented by the following options:
homozygous white chickens (CC) – 25%;
homozygous black chickens (cc) – 25%;
heterozygous variegated chickens (Cc) – 50%.