Question: Certain diseases (ex. Sickle cell anemia, cystic fibrosis) are autosomal recessive. This means that each person has two relevant genes, and both genes must be for the disease before the person is afflicted. If the person has only one gene for the disease, he or she does not get the disease and is called a carrier. Suppose that two married adults are both carriers; that is, each has one gene for the disease and one gene for the disease and one gene for normality. Each parent will pass on one gene to each child. What is the probability that

a. the couple’s child will neither have the disease nor be a carrier?

b. The couple’s child will have the disease?

c. The couple’s child will be a carrier of the disease?

d. Ina family of two children, both will be carriers of the disease?

e. In a family of four children, at least one children will have the disease?