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  4. In Drosophila, the sex is determined by

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Q. In Drosophila, the sex is determined by

Rajasthan PMTRajasthan PMT 2007

Solution:

Calvin Bridges demonstrated that in Drosophila, the sex is determined by ratio of the number of X-chromosomes to the sets of autosomes. According to balance theory of sex determination, Y-chromosome of Drosophila does not important for the determination of sex.