Mitosis

• What are the 3 stages of the cell cycle?

  • interphase
  • mitosis
  • cytokinesis
• What are the four stages of mitosis in order?

  Prophase, metaphase, anaphase, telophase
• What happens in prophase of mitosis?

  • chromosomes condense and become visible
  • nuclear membrane begins to break down
  • spindles begin to form
• What happens in metaphase of mitosis?

  • chromosomes line up individually at the equator of the cell
  • chromosomes are attached to spindles at the centrometre
  • the nuclear membrane fully breaks down
  • spindles fully form
• What happens in anaphase of mitosis?

  • spindles contract
  • sister chromatids are separated and pulled to opposite poles by the centrometre
• What happens in telophase of mitosis?

  • chromosomes decondense
  • spindle breaks down
  • nuclear membrane reforms
• How do you calculate mitotic index?

  number of cells in mitosis $\div$total number of cells