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The sperm cell determines the gender of a human baby. Ova only have X sex chromosomes, but sperm cells can have either an X or a Y sex chromosome. If an X sperm fertilizes an egg, the offspring will be XX and be female. If a Y sperm fertilizes an egg, the offspring will be XY and be male.

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11y ago
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13y ago

Pretty much a matter of chance. The first sperm to make it to the egg is the one that will fertilize the egg.

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11y ago

The sperm cell.

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Q: Which cell determends the gender of a human baby?
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