MAURO FERMARIELLO / SCIENCE PHOTO LIBRARY MAURO FERMARIELLO / SCIENCE PHOTO LIBRARY
DNA analysis. Geneticists discussing an analysis of DNA (deoxyribonucleic acid) samples. The results are displayed on the computer screen. Each white band represents a fragment of DNA. The samples have been analysed by electrophoresis, a technique that separates DNA fragments on the basis of size. DNA is the genetic material containing the instructions necessary for the development and functioning of all organisms.
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