STEPHEN AUSMUS / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY STEPHEN AUSMUS / US DEPARTMENT OF AGRICULTURE / SCIENCE PHOTO LIBRARY
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DNA research. Geneticist (centre) and technician (left) analysing DNA (deoxyribonucleic acid) markers of switchgrass (Panicum virgatum) plants using capillary gel electrophoresis. Electrophoresis is the application of an electric field in order to separate an organism's DNA for analytical purposes. Here they are characterising genetic differences among switchgrass plants and relating these differences to geographic variation.
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