Question

what is the sex of drosophila which contains 12 autosomes and three X chromosomes​

Answer 1

Although both mammals and fruit flies produce XX females and XY males, their chromosomes achieve these ends using very different means. The sex-determining mechanisms in mammals and in insects such as Drosophila are very different. In mammals, the Y chromosome plays a pivotal role in determining the male sex.

Answer 2

Sex Determination in Drosophila

Explanation:

• In Drosophila, the chromosomal premise of sex determination  is because of the proportion of X chromosomes to sets of autosomes.  in Drosophila, n = 4: one sex chromosome and three unique autosomes
• Consequently, one autosomal set, which we will speak to as An, includes the three distinct autosomes and, in a diploid fly, A = 2. The impact of this X:A proportion can best be seen by looking at sex-chromosome aneuploids. A typical 2X Drosophila diploid (XX AA) has a X:A proportion of 1.0 and is phenotypically female
• A XY diploid (XY AA) has a X:A proportion of 0.5 and is male; a XO diploid likewise is male (albeit sterile). Triploids with three X chromosomes (XXX AAA) are females, those with one X (XYY AAA) are male, and those with two X's (XXY AAA) are "in the middle of" (intersexes)