DR GOPAL MURTI / SCIENCE PHOTO LIBRARY DR GOPAL MURTI / SCIENCE PHOTO LIBRARY
Metaphase cell division. Coloured transmission electron micrograph of a section through a HeLa cell during metaphase cell division (mitosis). At centre are chromosomes (red); during metaphase the chromosomes line up in one plane in the centre of the cell, in preparation for nuclear division. The chromosomes are moved by spindle microtubules (not seen). At this stage of mitosis, the nuclear membrane has broken down. Organelles (white) are visible in the cytoplasm. During mitosis a cell produces two genetically identical daughter cells. HeLa cells are human cancer cells cultured in the laboratory and used in cancer research. Magnification: x2200 at 6x4.5cm size.
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