If a homozygous white horse CwCw and a homozygous black horse CbCb are bred together what is the likehood that their offspring will be roan with both colors represented in their hair if this gene follows a codominant inheritance pattern?

Question

A. 100%
B. 0%
C. 25%
D. 50%

Answer 1

To determine the likelihood of producing a roan offspring when a homozygous white horse (CwCw) is bred with a homozygous black horse (CbCb) under codominant inheritance, we need to evaluate the possible genotypes of the offspring.

In this case:

• Cw represents the allele for white.
• Cb represents the allele for black.

When these two horses are bred, all the offspring will inherit one allele from each parent, resulting in the following genotype:

• All offspring will have the genotype CwCb.

Since the inheritance pattern is codominant, the CwCb genotype expresses both colors. Therefore, the offspring will appear as roan, having both white and black hairs.

Thus, the likelihood that their offspring will be roan is:

A. 100%