A male child will be born to the parents only when

the father is stouter than the mother.

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an ovum having the Y-chromosome fertilizes with a sperm.

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a sperm having the Y-chromosome fertilizes with the ovum.

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a sperm having the X-chromosome fertilizes with an ovum.

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Solution

The correct option is C a sperm having the Y-chromosome fertilizes with the ovum.
Sex of the offspring in humans is decided by the fertilizing sperm. If the sperm has an X-chromosome, a girl will be formed. If the sperm has an Y-chromosome, it will result in a boy.

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Similar questions

What will be the sex of the child born :

(a) if X chromosome carrying sperm fertilizes an ovum containing X chromosome?

(b) if Y chromosome carrying sperm fertilizes an ovum containing X chromosome?

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