The F1 progeny all had walnut combs. When F1 males and females were crossed to each other, there were these offspring: 93 walnut 11 single 29 rose 32 pea Explain how comb morphology is inherited. In another cross, a walnut rooster was mated to a pea hen, and the progeny consisted of 12 walnut, 11 pea, 3 rose, and 4 single chickens. What were the genotypes of the parents?