Solveeit Logo
Login

Question

Biology Question on Principles of Inheritance and Variation

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

A

In human beings Y chromosome 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

Answer

In human beings Y chromosome is active in sex determination

Explanation

Solution

In Drosophila, the XXY condition leads to femaleness whereas in human beings, the same condition leads to Klinefelter's syndrome in males. It proves that Y chromosome is active in sex determination in both human beings and Drosophila. This observation highlights the role of the Y chromosome in determining male sex characteristics.

So, the correct option is (A): In human beings Y chromosome is active in sex determination