Question

Cystic fibrosis is a hereditary disease. The allele for cystic fibrosis is recessive. What does this mean?

Answer 1

Cystic fibrosis is an example of a recessive disease. That means a person must have a mutation in both copies of the CFTR gene to have CF. If someone has a mutation in only one copy of the CFTR gene and the other copy is normal, he or she does not have CF and is a CF carrier.

Answer 2

Cystic fibrosis can be carried in a heterozygote and affect a homozygous offspring.

Step-by-step explanation: