Suppose That Extra Fingers and Toes Are Caused by a Recessive

Multiple Choice

Suppose that extra fingers and toes are caused by a recessive trait, but it appears in only 60% of homozygous recessive individuals. Two heterozygotes conceive a child. What is the probability that this child will have extra fingers and toes?

A) 0.05
B) 0.10
C) 0.15
D) 0.25
E) 0.33