PETER MENZEL / SCIENCE PHOTO LIBRARY PETER MENZEL / SCIENCE PHOTO LIBRARY
Professor Alec Jeffreys (b. 1950), English molecular biologist and discoverer of DNA fingerprinting. In the background is an image of an autoradiogram, the visualisation technique used to compare DNA samples. A DNA fingerprint is a unique genetic sequence which identifies any individual, human or animal, from a tiny sample of tissue such as blood, hair, or sperm. Its many uses include the identification and conviction of criminals, and the proving of family relationships, such as the paternity of a child. Only monozygotic 'identical' twins share the same DNA. Jeffreys is a professor in the Department of Genetics at the University of Leicester, England.
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