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Explain how the union of an ovum and sperm creates a human being with unique traits.

User Rno
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Answer:

Your body sheds the thick lining of the uterus, and your period starts. If one sperm does make its way into the Fallopian tube and burrows into the egg, it fertilizes the egg. The egg changes so that no other sperm can get in. ... If the sperm has a Y chromosome, your baby will be a boy

User Bilal Barakat
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