Question

if pinkys parents can taste ptc, but the pinky cannot, then she is genotype tt. what genotype must both of her parents be?
□ tt
□ tt

Explanation:

Since Pinky has genotype tt and inherits one allele from each parent, and her parents can taste PTC (tasting is dominant), they must each carry a recessive t - allele along with a dominant T - allele to be able to taste PTC while passing on the recessive allele to Pinky.

Answer:

Tt