🤓 Based on our data, we think this question is relevant for Professor Yeargain's class at UCF.
a cross between individuals with true-breeding dominant and recessive traits, respectively, would lead to an F1 progeny that are heterozygous for the trait. A cross between these progeny (i.e. a hybrid cross) would basically lead to four outcomes.
Starting with a cross between AA and aa, the proportion of heterozygotes in the F2 progeny will be: