Question

What must be the genotype of a couple that has a 100% chance of producing offspring that areheterozygous for the PTC taster gene?

Answer 1

A taster gene is a dominant trait. The probable gene of the parents that is more likely to produce 100% heterozygous offspring are:

Parent 1- TT (homozygous taster)

Parent 2- Tt (heterozygous taster)

When these genotypes TT X Tt are crossed the results are:

TT, TT, Tt, Tt

TT- 50% homozygous taster of PTC

Tt- 50% heterozygous taster of PTC