JOSEPH F. GENNARO JR. / SCIENCE PHOTO LIBRARY JOSEPH F. GENNARO JR. / SCIENCE PHOTO LIBRARY
Coloured light micrograph of mitosis in a roundworm (Ascaris). Mitosis is the cell division of a nucleus, typically consisting of four stages: prophase, metaphase, anaphase, and telophase. It usually results in two new nuclei, each of which contains a complete copy of the parental chromosomes. Magnification 64x at 35mm.
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