Cystic Fibrosis Is a Fatal Lung Condition That Results from a Recessive

Multiple Choice

 Cystic fibrosis is a fatal lung condition that results from a recessive gene. If one parent is a healthy carrier for the condition while the other is not a carrier, what is the likely outcome for any children they might have?

A) The children will be heterozygous for cystic fibrosis, and all will develop the disease.
B) Fifty percent of their children will develop the disease, and the other fifty percent will be carriers.
C) None of the children will have the disease, and none will be carriers.
D) None of the children will have the disease, but each child has a fifty percent chance of being a carrier.