HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY HERVE CONGE, ISM / SCIENCE PHOTO LIBRARY
Mitosis. Light micrograph of hyacinth root cells undergoing mitosis (nuclear division). Mitosis is the formation of two daughter nuclei from one parent nucleus. One cell at upper right is in metaphase. The chromosomes, which contain 2 identical chromatids and are made of deoxyribonucleic acid (DNA, red), are lining up along the centre of the cell, ready to be separated. At bottom centre a cell is in telophase, the last stage of mitosis before cytokinesis (cellular division). The chromosomes have been separated and moved to opposite poles of the cell. The chromatids are divided equally between the daughter cells. Magnification: x450 when printed at 10 centimetres wide.
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