1.

In Drosophila XXY represents a female but in human it is an abnormal male. It shows that:

A. Y-chromosome is essential for male sex in human.
B. Y-chromosome is essential for female sex determination in Drosophila.
C. Y-chromosome is not essential for male sex determination in human.
D. All of the above
Answer» B. Y-chromosome is essential for female sex determination in Drosophila.


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