Question: Cystic fibrosis is inherited withthe autosomal recessive allele c. Individuals with the autosomal dominant allele C do not have the disease. Jessica does not have cystic fibrosis but she has a brother with the disease. Her husband Jerry also does not have cystic fibrosis but has a sister with the disease.

A- What is the probability that Jessica carries the c allele?

B- What is the probability that Jerry carries the c allele?

C- What is the probability that Jessica and Jerry could have a child with cystic fibrosis?

D- Out of 3 children born to Jessica and Jerry, what is the probability that 2 will have cystic fibrosis?

E- For Jessica and Jerry, what is the probability that their first child would not have cystic fibrosis, their second child would have cystic fibrosis and their third child would not have the disease?