Question

A Drosophila has XXXYY sex chromosomes. All the autosomal chromosomes are normal. The sexual phenotype will be.

• A. Normal female
• B. Super female
• C. Intersexual
• D. Male

Answer 1

The correct option is B Super female

A metafemale (or superfemale) is a low viability Drosophila fruit fly with a female phenotype in which the ratio of X chromosomes to sets of autosomes (A) exceeds 1.0. For example: a fly with one X chromosome and two sets of autosomes is a normal male, a fly with two X chromosomes and two sets of autosomes is a normal female, and a fly with three X chromosomes and two sets of autosomes (or four X chromosomes and three sets of autosomes) is a metafemale.

So, the correct answer is 'Super female'.