Question

In Drosophila, the sex is determined by

• A. Whether the egg is fertilized or develops parthenogenetically
• B. The ratio of number of X-chromosomes to the sets of autosomes
• C. X and Y chromosomes
• D. The ratio of pairs of X-chromosomes to the pairs of autosomes

Answer 1

The correct option is B The ratio of number of X-chromosomes to the sets of autosomes

The ratio of X and A chromosomes is responsible for determination of sex in Drosophila. For instance, in case of superfemale, the number of X chromosome is XXX and set of autosomes is AA.