Question

Starting with a cross between AA and aa, what proportion of heterozygotes would be expected in the F2 progeny?

Answer 1

The expected proportion of heterozygotes in the F2 progeny is 50%.

Step-by-step explanation:

In a cross between AA and aa, the F1 generation will all be heterozygotes (Aa). When the F1 generation heterozygotes are crossed, the expected proportion of heterozygotes in the F2 progeny is 50%. This is because in the F2 generation, the possible genotypes are AA, Aa, and aa. Since Aa represents a heterozygote, it will make up 50% of the F2 progeny.