Cell division

• Chromosome

  Condensed molecule of DNA in the nucleus
• Chromosomes exist in pairs
• We have 23 pairs of chromosomes (46)
• Purpose of mitosis

  • Growth and development
  • Repair
  • Asexual reproduction
• Cell cycle

  1. Chromosomes duplicate and all sub-cellular structures replicate

  2.Chromosomes are pulled to opposite sides of the cell. Nucleus divides

  3. Cell membrane and cytoplasm divide forming 2 identical daughter cells
• In mature animals, cell division is mainly restricted to repairing tissues by replacing old or damaged cells