In Drosophila the XXY condition leads to femaleness whereas in human beings the same condition leads to Klienfelter's syndrome in male. It proves

Question

In Drosophila the XXY condition leads to femaleness whereas in human beings the same condition leads to Klienfelter's syndrome in male. It proves (A) in human beings Y chromosme is active in sex determination (B) Y chromosome is active in sex determination in both human beings and Drosophila (C) in Drosophila Y chromosome decides femaleness (D) Y chromosome of man have genes for syndrome.

Tardigrade Admin · Accepted Answer

In Drosophila, XXY condition leads to femaleness. Cytological examination have suggested that Y-chromosome does not play any role in determination of sex in Drosophila. In human being, XXY is phenotypically male with underdeveloped testes gynecomastia and often mental retardation. It is caused by the union of a non-disjunct XX egg and sperm and a normal X egg and abnormal XY sperm. This indicates that in human being Y chromosome is active in sex determination.

Q. In Drosophila the XXY condition leads to femaleness whereas in human beings the same condition leads to Klienfelter's syndrome in male. It proves

in human beings Y chromosme is active in sex determination

Y chromosome is active in sex determination in both human beings and Drosophila

in Drosophila Y chromosome decides femaleness

Y chromosome of man have genes for syndrome.