A 45-year-old man who has been diagnosed with Huntington 's disease has four children. Each child will have a:
A) 25% chance of inheriting the disease
B) 50 % chance of inheriting the disease
C) 75% chance of inheriting the disease
D) No chance of inheriting the disease
Ans: B
Feedback: Huntington's Disease is an autosomal dominant disorder. Autosomal dominant inherited conditions affect female and male family members equally and follow a vertical pattern of inheritance in families. A person who has an autosomal dominant inherited condition carries a gene mutation for that condition on one chromosome pair. Each of that person's offspring has a 50% chance of inheriting the gene mutation for the condition and a 50% chance of inheriting the normal version of the gene. Based on this information the choices of 25%, 75%, or no chance of inheriting the disease are incorrect.
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