A) 2 pairs of autosomes and 1 pair of as chromosomes
B) 3 pairs of autosomes and 1 pair of as chromosomes
C) 1 pair of autosome and 3 pairs of sea chromosomes
D) 2 pairs of autosomes and 2 pairs of sea chromosomes
Correct Answer: B
Solution :
In Drosophila, total number of chromosomes is 8, of which 6 are autosomes, common to both male and female. The fourth pair is of sex chromosomes. In male, this is represented by XY (ie, male Drosophila has 6 + XY) and in female by XX (ie, female Drosophila has 6+XX).
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