In fruit flys, long-wings (L) is dominant to short-wings (l) and a gray body color (G) is dominant to black body color (b). A long-winged Drosophila female with a gray body mates with a black, short-winged male fly (llgg). The phenotypic ratio of the offspring is 1:1:1:1. What is the genotype of the female fly?
A) LlGg
B) LLGG
C) llgg
D) LLgg
E) llGG

Question

Quizplus · Accepted Answer

The female fly must be heterozygous for both traits (LlGg) to produce a 1:1:1:1 phenotypic ratio when crossed with a homozygous recessive male (llgg). This indicates that each trait is assorted independently, and each parent contributes one allele for each trait, resulting in four possible combinations of traits in the offspring.

In Fruit Flys, Long-Wings (L) Is Dominant to Short-Wings (L)