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Are identical twins completely identical?

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After all, they derive from just one fertilized egg, which contains one set of genetic instructions, or genome, formed from combining the chromosomes of mother and father. But experience shows that identical twins are rarely completely the same. read more

Identical twins come from the same zygote. This means that the egg and sperm are the exact same, which equates to identical DNA. From birth, yes they should be 100% genetically identical. read more

SAN FRANCISCO – Identical twins may not be so identical after all. Even though identical twins supposedly share all of their DNA, they acquire hundreds of genetic changes early in development that could set them on different paths, according to new research. read more

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