Which genotypes can taste PTC?

Question

Only TT

tt

TT and Tt

Answer 1

The ability to taste PTC (phenylthiocarbamide) is determined by a simple Mendelian trait where the tasting ability is dominant over the non-tasting trait. In this case:

• TT (homozygous dominant) and Tt (heterozygous) individuals can taste PTC.
• tt (homozygous recessive) individuals cannot taste PTC.

Therefore, the correct answer is TT and Tt.