Q.

What determines the sex of a child?

A. Chromosomes of the father
B. Chromosomes of the mother
C. Rh factor of the parents
D. Blood group of the father
Answer» A. Chromosomes of the father
Explanation: In humans and several other species of animals, the father determines the sex of the child. In the XV sex-determination system, the female-provided ovum contributes an X chromosome and the maleprovided sperm contributes either an X chromosome or a Y chromosome, resulting in female (XX) or male (XY) offspring, respectively.
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