PETER MENZEL / SCIENCE PHOTO LIBRARY PETER MENZEL / SCIENCE PHOTO LIBRARY
Forensic use of DNA fingerprints. A scientist taking a sample from blood-stained jeans during criminal investigations. DNA may be isolated from the sample and sequenced, providing a DNA fingerprint. This may then be compared with DNA from the victim and any suspect. In some cases, this may be used in conjunction with other evidence to positively link a suspect with both the victim and the scene of a crime. Modern amplification techniques allow DNA sequences to be taken from extremely small samples, such as a few spots of blood or a few hair follicles. Photographed at the Home Office Forensic Science Service, Aldermaston, UK. J.Bark).
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