Cystic Fibrosis Is Caused by Mutations in the CF Gene

Multiple Choice

Cystic fibrosis is caused by mutations in the CF gene, and there are several different mutations that are known to result in CF disease. The CF mutations behave as recessive alleles to the WT CF allele. If two carriers that have different mutations in their CF genes have children what is the probability that one of their children will have CF disease?

A) 100%
B) 25%
C) 50%
D) 75%