When drosophila flies with normal wings were crossed, the offspring of 80 individuals was obtained. Among them

When drosophila flies with normal wings were crossed, the offspring of 80 individuals was obtained. Among them, there were 60 flies with normal wings, and the rest had rudimentary wings. Determine a) which feature is dominant; b) genotypes of parental individuals and offspring.

Given:
F1-80 individuals
60 – norm wings
Find: genotype P and F1
Decision:
Because out of 80 individuals 60 with normal wings, which means 20 individuals with embryonic wings.
The ratio of normal wings to embryonic wings is 3: 1. This speaks of complete domination. So the parents are heterozygotes.
Let’s check
R: ♀️Aa * ♂️Aa
G: A a * A a
F1: AA (25% – normal wings)
Aa (50% – normal wings)
aa (25%-winged)