If parents wanted to learn more about their genetic history and the possibility of passing a genetic disease on to a child, they should

have a carrier identification test
be tested for pku
see a genetic counselor
have a carrier identification test, and see a genetic counselor

The correct answer is the last option.

Explanation:

Carrier identification test is a screening test that tells if a person is carrier of a particular autosomal recessive disease. It helps in determining the possibility of passing that disease to a child.

Genetic counsellor is professional who is expert in human genetics, research, lab work, counselling, et cetera. After the test, it is best to contact a genetic counsellor as he can explain the family pedigree of the disease. He can best explain the probability of passing a genetic disease to the child.

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