If a couple has a child with cystic fibrosis, an autosomal recessive disorder, what is the probability that their next child will be a carrier?
Q1. If a couple has a child with cystic fibrosis, an autosomal recessive disorder, what is the probability that their next child will be a carrier?
Answer: 2/3
Explanation: Both parents must be carriers, so 2/3 chance the next child is a carrier.