The autosomal (not X-linked) gene for brachydactyly, short fingers, is dominant to normal finger length. Assume that a female with brachydactyly in the heterozygous condition is married to a man with normal fingers. What is the probability that their
first two children will have brachydactyly?
A) 1/8 B) 1/2 C) 2/3 D) 1/4 E) 3/4
Answer: D
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