cell division

• Chromosomes


  Coiled up lengths of DNA molecules, which carry genes
• Chromosomes


  • Found in the nucleus
  • Normally in pairs in body cells
• Cell Cycle


  A series of stages in which cells divide to produce new cells
• Before a cell divides

  1. Grows in size

  2. Increases the amount of subcellular structures, e.g. mitochondria and ribosomes

  3. Duplicates its DNA
• What is mitosis

  The stage of the cell cycle when the cell divides
• Mitosis


  1. The cell's DNA has been doubled

  2. One set of chromosomes is pulled to each end of the cell

  3. The cytoplasm and cell membranes divide

  4. Two cells are formed, which are identical to each other and to the parent cell
• Mitosis allows multicellular organisms to grow or replace cells that have been damaged