Cell division

• Describe the cell cycle

  First stage:

  • DNA replicates to form two copies of each chromosome
  • Cell enlargement
  • Duplication of internal structures such as mitochondria and ribosomes

  
  

  Second stage (mitosis):

  • One set of chromosomes is pulled to each side of cell.
  • Nucleus divides.

  
  

  Third stage (cytokinesis):

  • Cytoplasm and cell membrane divide to form two genetically identical daughter cells.
• Why is mitosis important?

  It is essential for growth and development of multicellular organisms.
• What type of reproduction does mitosis occur

  asexual reproduction
• Order in size: cell, gene, chromosome, nucleus


  SMALLEST

  gene

  chromosome

  nucleus

  cell

  LARGEST