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Why is the sex of a human child considered to be influenced more by the father?

Answer and explanation

Correct answer: Because the father's sperm can give either an X or a Y chromosome.

In the usual human XX–XY system, the mother’s egg carries an X chromosome, whereas a father produces two types of sperm: X-bearing and Y-bearing. Fertilisation by an X sperm generally produces XX, while fertilisation by a Y sperm generally produces XY. Thus the paternal sperm determines whether the zygote receives X or Y from the father. Option B is correct; the other statements misrepresent the chromosomes in eggs or sperm.

Related tags

Sex DeterminationChromosomesHuman ReproductionHeredityHeredity And EvolutionWorld Of LivingScienceClass 10 Mcq

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