Question

how many chromosome are present in drosophila

Answer 1

Four present.....
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Answer 2

hey there!!

$\boxed{Drosophila\: Chromosomes:}$
In Drosophila melanogaster there are 4 homologous pairs of chromosomes: -

2 pairs of large autosomes, ( one slightly smaller than the other pair),
1 pair of very small autosomes, and a pair of chromosomes.
✴️Females normally have two X chromosomes; males have one X and one tiny Y chromosome.

hope it helps you.