cell division by mitosis

• Mitosis


  The process by which a cell divides into two or more cells
• Cell


  • Contains a nucleus
  • Contains chromosomes made of DNA
• Body cells contain 23 pairs of chromosomes
• Gamete cells have unpaired chromosomes
• Chromosome


  Carries a large number of genes that determine many features
• Most human chromosomes contain hundreds of genes
• Animals and plants contain a very large number of cells
• Cell cycle including mitosis

  1. DNA replication

  2. Mitosis

  3. Cell division
• Mitosis


  • One set of chromosomes is pulled to each end of the cell
  • The nucleus also divides
  • The cytoplasm and cell membrane divide to form two identical cells
• Stages of mitosis


  The stages shown in this video are the only ones required for the exam
• Mitosis copies one cell into two
• Functions of mitosis


  • Essential for growth and development of multicellular organisms
  • Repairs organisms when damaged
  • Occurs during asexual reproduction