In cows,certain coat colors are co-dominant.For example red is dominant; white is recessive; roan (red and white)is co-dominant.If a roan bull is crossed with a white cow what will be the expected coat colors of the calves?
A) all roan
B) half roan and half white
C) half red and half white
D) 3/4 roan and 1/4 white
E) 1/2 roan, 1/4 red, 1/4 white

Question

Quizplus · Accepted Answer

When a roan bull is crossed with a white cow, the possible gametes of the bull are R or W, and the gametes of the cow are both W. The offspring will inherit one allele from each parent, so all of them will be heterozygous Roan (RW genotype), which is a blend of red and white. Therefore, the expected coat colors of the calves will be half roan and half white.

In Cows,certain Coat Colors Are Co-Dominant