Question

cystic fibrosis is an autosomal recessive disorder in which mucus builds up in the lungs and pancreas. a healthy, non - carrier man marries a woman with cystic fibrosis. what is the genotype of the woman with cystic fibrosis?
aa
aa
aa
she could be aa or aa

Explanation:

Cystic fibrosis is an autosomal - recessive disorder. For an individual to have a recessive disorder, they must have two copies of the recessive allele. If we use 'A' for the dominant allele and 'a' for the recessive allele, a person with the disorder will have the genotype 'aa'.

Answer:

C. aa