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 alleles must show incomplete dominance.
The alleles must show incomplete dominance.

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 allele for white hair must be completely dominant to the the allele for black hair.

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 codominance, both alleles in a heterozygous organism contribute to the phenotype, resulting in a combination of traits being expressed. In this case, the roan coat shows both the white and black fur equally, indicative of codominance rather than incomplete dominance or complete dominance.