Question

13. मनुष्यों के लिंग-निर्धारण का कारक कौन है?
(A)X-गुणसूत्र
(B)Y-गुणसून
(C) A तथा-B दोनों
(D) इनमे से कोई नहीं​

Answer 1

Answer:

X chromosome।

Explanation:

The female have XX chromosome and male have XY chromosome so when fertilization of egg with sperm occur there is only the male chromosome which decide the sex as it have XY and female have XX.

If X of male fertilize with X the the XX will be girl and of X of female fertilize with the Y of male the XY will be boy.