When a child is conceived, the parents pass along 46 genes, two of which decide whether the baby will be a boy or a girl.

Name: When a child is conceived, the parents pass along 46 genes, two of which decide whether the baby will be a boy or a girl.
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When a child is conceived, the parents each pass along 23 chromosomes, for a total of 46 chromosomes. Among these, one pair (the sex chromosomes) determines the baby's sex: females have XX and males have XY.

When a Child Is Conceived, the Parents Pass Along 46