A couple, both descended from eastern European (Ashkenazic) Jews, visit a genetic counselor before trying to have children. In view of their ethnic background, the counselor recommends that they be tested to see if they are carriers for which of the following genetic disorders?
a) cystic fibrosis
b) hemophilia
c) sickle-cell disease
d) hypercholesterolemia
e) Tay-Sachs
