Huntington’s disease (HD) is a neurodegenerative genetic disorder involving an autosomal dominant mutant allele with high penetrance. If a father’s mother had HD, what is the probability that his first child will also have HD?
a. It depends on whether the father has the allele.
b. It depends on whether the trait is recessive.
c. 0.5 or 50%
d. 0.25 or 25%
a. It depends on whether the father has the allele.
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