A couple have a child with Tay-Sachs disease.What is (are)their genotype(s)?
A) both are heterozygous
B) one is homozgous dominant and the other is homozgous recessive
C) both are homozygous dominant
D) both are homozygous recessive
E) more than one of these is possible

Question

Quizplus · Accepted Answer

Tay-Sachs disease is an autosomal recessive disorder, so both parents must be carriers (heterozygous) to have a child with the disease.

A Couple Have a Child with Tay-Sachs Disease