Final answer:
The Punnett square for a cross between a male with genotype AA and a female with genotype aa would show two possible genotypes for the offspring: Aa and aa.
Step-by-step explanation:
A Punnett square is a chart that allows you to easily determine the expected percentage of different genotypes in the offspring of two parents. In this case, the male parent has the genotype AA and the female parent has the genotype aa. By crossing these two individuals, the Punnett square would show two possible genotypes for the offspring: Aa and aa. Therefore, the correct answer is option B, Aa, aa.