Question

a breed of chicken shows codominance for feather color. one allele codes for black feathers, another codes for white feathers. the feathers of heterozygous chickens of this breed will be (1 point)

black.

white.

gray.

speckled (black and white).

Explanation:

Codominance is a genetic concept where both alleles in a heterozygous individual are fully expressed, not blended. For the chicken feather color, the black and white allele - coding feathers will both be expressed in heterozygous chickens, resulting in speckled (black and white) feathers. Black or white would be cases of complete dominance (only one allele expressed), and gray would be a case of incomplete dominance (alleles blend), which is not the case here.

Answer:

D. Speckled (black and white)