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
• Animals and plants contain a very large number of cells
• Cell cycle including mitosis

  1. Interphase

  2. Mitosis

  3. Cytokenesis
• 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
• Functions of mitosis


  • Essential for growth and development of multicellular organisms
  • Repairs organisms when damaged
  • Occurs during asexual reproduction
• Why might multi-celler organisms require more cells?

  Growth, Development(new cells for new tissues) and Repair(replace cells we lose each day)
• What is the cell cycle?

  series of steps that take place as the cell grows and then divides
• Where in the body does mitosis take place?

  Everywhere
• How many cells does mitosis produce?

  Mitosis produces 2 cells, 1 cell divides into 2 cells
• What do we call the cells produced by mitosis?

  Daughter cells.
• The cells are genetically identical
• How many divisons are there?

  1
• Humans have 23 pairs of chromosomes, 46 in total.
• What are the steps of mitosis and cytokinesis?

  1-DNA condenses to form chromosomes 2-Chromosomes line up agaisnt the center of the cell. 3-Cell fibires pull the two arms of the chromosomes on opposite sides of the cell 4- Cytokinesis to form 2 identical daughter cells.