In people, a dimpled chin is an autosomal dominant trait. Many famous celebrities, such as John Travolta and Michael and Kirk Douglas, have this condition. Assume that the wrestler and actor Hulk Hogan is homozygous for the dimpled chin, and he married a woman with a round chin. They had two children, Brooke and Nick. What proportion of their female progeny (such as Brooke Hogan)will show the trait?

Question

Quizplus · Accepted Answer

Since Hulk Hogan is homozygous for the dimpled chin trait (DD) and the woman has a round chin (dd), all offspring will inherit one dominant allele (D) from Hulk Hogan and one recessive allele (d) from the mother, resulting in a genotype of Dd. Therefore, 100% of their female progeny will show the trait.

In People, a Dimpled Chin Is an Autosomal Dominant Trait