BSIP, LAURENT / SCIENCE PHOTO LIBRARY BSIP, LAURENT / SCIENCE PHOTO LIBRARY
Genetic research. Female technician holding a measuring cylinder in front of a screen displaying the human chromosomes. This karyotype shows the total complement of male chromosomes, 23 pairs in total. The chromosomes contain the whole of the genetic code, or genome, in the form of DNA (deoxyribonucleic acid). DNA has all the inherited instructions needed for the development and functioning of living organisms.
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