Identical twins<span> have the same genes, so they generally look alike and are the same sex.
</span>Fraternal twins<span> develop when two separate eggs are fertilized by two different sperm.</span>
The best way to describe a human sperm cell is a tad pole (Baby frog). Like the sperm cell the tad pole has a head, body and a tail. Though tad poles are finished products, the sperm cell needs to combine with the egg cell for it to be fertilized.
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Explanation:
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