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

Question

Quizplus · Accepted Answer

Polydactyly is caused by a dominant allele, which means that if one parent has the allele, there is a 50% chance each of their children will inherit it. The fact that the couple already has one child without polydactyly does not affect the probability of their next child having it. Therefore, the probability is 1/2 or 50%.

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