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Xx chromosomes are for female while xy chromosomes are for male

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The sex chromosomes XY determines the sex of the child. When an egg or sperm is made, it only gets one of the sex chromosomes from the parent. This means that women can only make eggs with an X chromosome.  But men can make either X or Y sperm. And when an X or Y sperm fertilizes the egg, the sex chromosome (X or Y) will be the gender of the child
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