Sheree Is Referred to a Genetic Counselor Because a Cystic

Multiple Choice

Sheree is referred to a genetic counselor because a cystic fibrosis (CF) test done as a routine part of her prenatal care indicated that she is a carrier of the most common mutant allele.Sheree is stunned,because no one in her family has the disease.She is 26 years old.The genetic counselor would most likely

A) explain autosomal recessive inheritance and suggest that Sheree's husband be tested for CF.
B) explain autosomal dominant inheritance and suggest that Sheree's husband be tested for CF.
C) explain autosomal recessive inheritance and suggest that Sheree's parents be tested for CF.
D) advise Sheree to have amniocentesis to check the fetus for the CF genotype.
E) explain that Sheree is obviously a new mutation and that the likelihood that her husband is too is very low, so there is no concern that the child would be affected.