Suppose both the father and the mother are "heterozygous" for the gene that controls ability to curl the tongue lengthwise, and this gene is dominant. What can we predict about their children?

Question

Quizplus · Accepted Answer

Since both parents are heterozygous, there are three possible genotypes for their offspring: homozygous dominant (able to curl), heterozygous (able to curl), or homozygous recessive (unable to curl). The offspring have a 75% chance of being able to curl their tongue and a 25% chance of not being able to curl their tongue. Therefore, the answer is D - they may be homozygous or heterozygous for ability to curl, or homozygous for inability.

Suppose Both the Father and the Mother Are "Heterozygous" for the Gene