In People, a Dimpled Chin Is an Autosomal Dominant Trait

question 82

Multiple Choice

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?

• A)0%
• B)25%
• C)50%
• D)75%
• E)100%

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