Polydactyly Is Expressed When an Individual Has Extra Fingers And/or

Multiple Choice

Polydactyly is expressed when an individual has extra fingers and/or toes. Assume that a man with six fingers on each hand and six toes on each foot marries a woman with a normal number of digits. Having extra digits is caused by a dominant allele. The couple has a son with normal hands and feet, but the couple's second child has extra digits. What is the probability that their next child will have polydactyly?

A) 3/4
B) 1/32
C) 7/16
D) 1/2
E) 1/8