A farmer bred two horses. One had a homozygous genotype and had white hair, the other had a homozygous genotype and had black hair. The resulting offspring had a roan coat, with both white and black furs showing equally. What is the explanation for how the offspring had the roan coat?(1 point)

Question

Responses

The allele for white hair must be completely dominant to the the allele for black hair.
The allele for white hair must be completely dominant to the the allele for black hair.
The allele for roan hair is found on the X chromosome and therefore is a sex linked trait.
The allele for roan hair is found on the X chromosome and therefore is a sex linked trait.
The allele for white hair must be codominant with the allele for black hair.
The allele for white hair must be codominant with the allele for black hair.
The alleles must show incomplete dominance.

Answer 1

The correct explanation for how the offspring had the roan coat is:

The allele for white hair must be codominant with the allele for black hair.

In this case, both alleles are expressed equally, resulting in a roan coat with both white and black fur present. Codominance is characterized by the expression of both alleles in the phenotype, which aligns with the observation of the offspring's coat color.