Cherubism is a rare autosomal dominant disease of the jaw. You have identified a family in which cherubism is segregating, as well as the mutation causing the disease. Through DNA testing you determine that 17 members of the family carry the mutation, but only 6 of them display cherubism. What is the penetrance of the mutation in this family?

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4