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Answered 2011-05-11 20:49:52
There are two types of twins- fraternal and identical. Fraternal twins are only siblings born at the same time. Identical twins started as 1 egg that split in two after being fertilized. The DNA of identical twins is, well.... identical. At one point, they WERE the same person.
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How many chromosomes do identical human twins have?
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Assuming you're referring to twins, identical twins come from the same fertilized cell that broke into two clumps of cells early in its development and so have identical DNA. Fraternal (non-identical) twins come from from two different cells that were fertilized by two separate sperm and while they develop at the same time, they each have unique DNA.
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There are differences in both DNA and fingerprints.The Claim: Identical Twins Have Identical DNA
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