The sexual phenotype of a fruit fly is determined by the ratio of the number of X chromosomes to the number of haploid sets of autosomal chromosomes (the X : A ratio)
-What is the sexual phenotype of a fruit fly that has XXYYY sex chromosomes and two sets of autosomes?

Question

Quizplus · Accepted Answer

The X:A ratio for this fruit fly is 2:2, which simplifies to 1. A ratio of 1 indicates a female phenotype in fruit flies.

The Sexual Phenotype of a Fruit Fly Is Determined by the Ratio