Identical twins are derived from the same fertilized ovum and, therefore, should be…well… identical, right? They look the same and often dress the same, especially as children, and many people often have a hard time distinguishing one twin from the other. They are indistinguishable by genetic testing.

However, identical twins are not always identical, as the authors of a recent letter to the editor of Forensic Science International Genetics point out (1). Continue reading “How Identical are Identical Twins?”