Parents of a child with cystic fibrosis want to know the chance of their next baby having this disease. What response by the healthcare professional is most accurate?
A)Each child will have a 25% chance of having the disease.
B)None of your male children will inherit this disease.
C)All of your children will probably be carriers.
D)There is no way to know because it is a random mutation.

Question

Quizplus · Accepted Answer

Cystic fibrosis is an autosomal recessive inherited disorder. When two parents each have the trait (are carriers), each child will have a 25% chance of having normal genes and being unaffected, a 50% chance of inheriting one of the mutated genes and being a carrier, and a 25% chance of inheriting the mutated gene from both parents and having the disease.

Parents of a Child with Cystic Fibrosis Want to Know