Mitosis

• Why do multicellular organisms require a continuous supply of new cells

  Growth

  Development

  Repair
• Mitosis

  Produces 2 cells that are genetically identical in 1 division producing daughter cells
• Steps of mitosis

  DNA condenses to form chromosomes

  Chromosomes line up along centre of cell

  Cell fibres pull two arms of each chromosome to opposite sides of the cell

  Cytokinesis - the entire cell divides to form two identical daughte cells
• Humans have 23 pairs of chromosomes