Drosophila flies with XXY genotype are females but in case

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Drosophila flies with XXY genotype are females but in case of humans, such individuals are abnormal males (Klinefelter's syndrome). This indicates that

1. The Y chromosome has no role in sex determination
2. In Drosophila, the Y chromosome is essential for sex determination
3. The Y chromosome is male determining in humans
4. The Y chromosome is female determining in Drosophila

Correct Option: C

In human the Y chromosome bears the androgenic factor or the male determining factor. Whereas in Drosophila the ratio of sex chromosomes to autosomes is the factor determining sex of the individual.