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 polled, produces a horned calf. Horned cow B,
produces a polled calf; and horned cow C produces a horned calf.
What are the genotypes of the bull and three cows (A, B, and C),
respectively? Please briefly justify your answer for the genotype
of each animal.