Drosophila flies with XXY genotype are females, but human beings with such genotype are abnormal males. It shows that
A. Y-chromosome is essential for sex detrmination in Drosophila
B. Y-chromosome is female determining in Drosophila
C. Y-chromosome is male determining in human beings
D. Y- chromosome has no role in sex determination either in Drosophila or in human beings
