the process of cell division

the process of cell division

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  • the process of cell devision
    • Chromosomes
      • Packages of DNA called chromosomes hold a cell's genetic information.
      • Prokaryotic chromosomes consist of a single, circular strand of DNA
      • Eukaryotic chromosomes are highly organized structure
        • the DNA winds around histone proteins, forming chromatin
        • Chromosomes make the precise separation of DNA  possible during cell devision
    • Cytokinesis
      • Cytokinesis differs in plant cells and animal cells
        • in plant cells, a cell plate forms, followed by a new cell membrane, and finally a new cell wall forms
        • in animal cells, the cell membrane draws in and pinches off
      • the division of the cytoplasm
    • the cell cycle
      • the cell cycle is the series of events in the growth and division of a cell
      • in the prokaryotic cell cycle, the cell grows, duplicates its DNA, and divides by pinching in the cell membrane
      • The eukaryotic cell cycle has four stages
        • G1 phase: the cell grows
        • M phase: the cell divides into two stages -- mitosis and cytokinesis
    • mitosis
      • the division of the cell nucleus
      • Mitosis occurs in four stages
        • Prophase: a cell's genetic material condenses, a spindle starts to form, and the nuclear envelope breaks down
        • Anaphase: sister chromatids separate and move toward centrioles
        • Metaphase: the duplicated chromosomes line up and spindle fibers connect to the centromeres
        • Telophase: the chromosomes begin to unwind and a nuclear envelope reforms


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