A fly (Drosophila) with an XY genotype has a mutation in its sex-lethal (Sxl) gene that renders its protein product nonfunctional. Which of the following describes the sex of this fly?
A) male
B) female
C) intersex
D) male, but it will be sterile
E) female, but it will be sterile

Question

Quizplus · Accepted Answer

In Drosophila, the sex-lethal (Sxl) gene is crucial for female development. An XY fly with a nonfunctional Sxl gene will develop as a male, as Sxl is not required for male development.

A Fly (Drosophila) with an XY Genotype Has a Mutation