The genotype for Tay-Sachs disease is tt. A homozygous dominant man and a heterozygous woman have a child with the genotype Tt for Tay-Sachs. Which term describes their child?
A. purebred
B recessive
C. affected
D. carrier
D. The child is described as a carrier since the child does not express the disease, but has one recessive allele which can be passed on during reproduction.
