iGenetics 3rd Edition by Peter Russell

Exercise 5

In cattle, the polled (hornless) condition ( P ) is dominant over the horned ( p ) phenotype. A particular polled bull is bred to three cows. Cow A, which is horned, produces a horned calf; polled cow B produces a horned calf; and horned cow C produces a polled calf. What are the genotypes of the bull and the three cows, and what phenotypic ratios do you expect in the offspring of these three matings?