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The sex of the human baby is male if ______

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in Biology – Class 12 by (271k points)
The sex of the human baby is male if ______

(a) sperm has X chromosome

(b) sperm has Y chromosome

(c) ovum has X chromosome

(d) ovum has Y chromosome

This question was addressed to me by my college director while I was bunking the class.

My question is taken from Human Reproduction topic in section Human Reproduction of Biology – Class 12

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The correct choice is (b) sperm has Y chromosome

Explanation: The sex in humans is determined by the sex chromosome that the male gamete carries. The females are XX hence meiosis results in all ova having X chromosome. Males are XY and 50% sperms have X and 50% have Y. Thus the determining factor that makes a baby male is Y chromosome in the sperm.

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