Suppose "A" is a dominant gene for the ability to taste phenylthiocarbamide (PTC) and "a" is a recessive gene for the inability to taste it. Which couples could possibly have both a child who tastes it and a child who does not?
A) father AA, mother aa
B) father Aa, mother AA
C) father Aa, mother Aa
D) father AA, mother AA

Question

Quizplus · Accepted Answer

Couples with genotype Aa (heterozygous) have the possibility of producing offspring with either a dominant phenotype (tasting ability) or recessive phenotype (inability to taste). Therefore, parents who are both Aa have a chance of producing both types of offspring.

Suppose "A" Is a Dominant Gene for the Ability to Taste