5. Female Sperm Exists

Though sperm comes from a man and seems like a purely masculine thing, the fact is that depending on which chromosome each individual sperm possesses, it can either be male or female.

A Y chromosome is male and an X chromosome is female, so depending on which swimmer arrives at its destination first, an XY combination will create a baby boy or an XX combination will make a baby girl.

They Are Useless with Directions!
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