PETER MENZEL / SCIENCE PHOTO LIBRARY PETER MENZEL / SCIENCE PHOTO LIBRARY
Forensic use of DNA fingerprints. A scientist taking a sample from a blood-stained pair of jeans. DNA from the sample is then sequenced, providing a DNA fingerprint (such as those seen at the edges of the frame). 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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