Imagine that coat color in horses was an example of incomplete dominance; neither black nor white is dominant and the heterozygous phenotype is gray. If two gray horses are mated, what will the offspring look like?

The offsprings will consist of the following genotypic and phenotypic ratio: 1 black : 2 gray : 1 white

Explanation:

The gene involved here codes for coat color in horses; the black allele (B) is not dominant over the white allele (W). Hence, they form an heterozygous offspring that is a combination of both phenotypes i.e. an intermediate, Gray horse (BW). This is an example of Incomplete dominance.

In a cross between two gray horses (BW), four possible offsprings with the following genotypes will be produced: BB, BW, BW, WW in the ratio 1:2:1.

This means that 1/4 of the offsprings will be black, 2/4 or 1/2 of the offsprings will be gray and 1/4 will be white.

substitution is the answer in this case