Huntington's Disease Is an Autosomal Dominant Trait

question 40

Multiple Choice

Huntington's disease is an autosomal dominant trait. Given the pedigree below, if individual IV- 2 has three children with a normal man, what is probability that exactly two of the three children would have the disorder?

• A) 3/8
• B) 7/8
• C) 0
• D) 1/2
• E) 1/8

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