Question

If karyotype of a Drosophila is AA-XXXY, its sexual phenotype is

• A. Matafemale
• B. Metamale
• C. Intersex
• D. Female with Y chromosome

Hint:

For understanding sex determination in Drosophila, remember that multiple X chromosomes result in a Matafemale phenotype, while an XXY configuration results in an intersex phenotype.

Answer 1

The Correct Option is A

Step 1: In Drosophila, the sexual phenotype is determined by the sex chromosomes present in its karyotype. 

Step 2: The karyotype AA-XXXY indicates that the organism has three X chromosomes and one Y chromosome. In Drosophila, the presence of multiple X chromosomes and the Y chromosome results in a phenotype that is considered a "Matafemale."