Mitosis

• Mitosis occurs in non-reproductive cells
• Interphase:

  • Growth
  • DNA replication
  • Cell Functions
• Prophase:

  • "Pro" means "before"
  • Chromosomes condense
  • Nucleolus disperses
  • Spindle begins to form around centrosomes
• Prometaphase:

  • Nuclear envelope breaks up
  • Spindle attaches to chromosomes at centromeres
• Metaphase:

  • chromosomes line up at metaphase plate
  • chromosomes line up in the "middle"
• Anaphase:

  • "A" for Away
  • chromosomes split, pulled to opposite ends
  • spindles move chromosomes to the ends
  • cell elongates (each former chromatid is now a chromosome)
  • chromosomes moves "away" to opposite sides of the cell
• Telophase:

  • "T" for "two" new cells
  • chromosomes disperse
  • nucleoli form
  • nuclear envelopes assemble
  • spindle breaks up
  • cytokinesis begins
• Animal Cytokinesis:

  • cleavage furrow
  • plasma membrane pinches cytoplasm in two
• Plant Cytokinesis:

  • a cell plate is formed
• How many cells does mitosis produce?

  Two identical daughter cells