Question

A woman is heterozygous for a rare dominant autosomal genetic disease, Neurofibromatosis. She marries a normal man (homozygous recessive for Neurofibromatosis), who has Red-Green Color blindness, an X-linked recessive trait. They have children. What is the chance they will have a girl with Neurofibromatosis?

A. 25%
B. 0%
C. 50%
D. 100%

Answer 1

A. 25%

Step-by-step explanation:

The chance of getting a girl is 50%

The chance of getting a child with Neurofibromatosis is 50%

Multiply the two to find the chance of a girl getting the condition = 25%