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Identical Twinning

By Pamela Prindle Fierro, About.com

Definition: A type of twins derived from a single egg. Identical twins form when a single fertilized egg splits into two embryos. Because the twins share the same DNA set, they tend to have similar features. For more information, see: All About Identical Twins
Also Known As: monozygotic
Common Misspellings: idential
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