Cystic fibrosis (CF)is caused by a recessive allele.A child has CF,even though neither of his parents has CF.Which of the following describes the genotypes of the parents?

Question

Quizplus · Accepted Answer

Since cystic fibrosis is a recessive disorder, both parents must be carriers (heterozygous) for the child to have a chance of being affected. This means each parent has one normal allele and one CF allele.

Cystic Fibrosis (CF)is Caused by a Recessive Allele