Question

Cystic fibrosis is a homozygous recessive condition. A genetic counselor should advise concerned parents that , if each of them has a parent who has cystic fibrosis yet neither of the concerned parents is affected, the probability of their potential child having cystic fibrosis is?

Answer 1

The probability of a potential child having cystic fibrosis is 25% if both parents are carriers of the cystic fibrosis gene.

Step-by-step explanation:

The probability of a potential child having cystic fibrosis is 25% if both parents are carriers (Ff) of the cystic fibrosis gene and are unaffected by the condition. This is because cystic fibrosis is an autosomal recessive disorder, which means that a child must inherit two copies of the recessive allele in order to have the condition.