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some doctor claim that their medicines provide 100% guarantee for getting a son or daughter according to the wish of the parents .how do you react to such claims on the basis of your knowledge of genetic ?

There is no such claim.
Men determine the sex of a baby depending on whether their sperm is carrying an X or Y chromosome. An X chromosome combines with the mother’s X chromosome to make a baby girl (XX) and a Y chromosome will combine with the mother’s to make a boy (XY).


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