In the mating of an Aa female and an Aa male,the genotypic outcome predicted by a Punnett square is ________.
A) three-quarters Aa and one-quarter AA
B) one-half AA and one-half aa
C) three-quarters Aa and one-quarter aa
D) one-quarter AA, one-quarter aa, and one-half Aa
E) All offspring will have the genotype Aa

Question

Quizplus · Accepted Answer

When an Aa female and an Aa male mate, their Punnett square would look like:
 
 | A | a
--|---|--
A | AA| Aa
a | Aa| aa

From this, we can see that there is a 25% chance of getting AA offspring, a 50% chance of getting Aa offspring, and a 25% chance of getting aa offspring. Therefore, the genotypic outcome predicted by a Punnett square is one-quarter AA, one-quarter aa, and one-half Aa.

In the Mating of an Aa Female and an Aa