Cell cycle & mitosis

• Why do cells need to divide in the body?

  For growth and repair
• What is the cell cycle?

  The process of cell growth and division
• What are the two main stages of the cell cycle?

  1. Cell growth and content replication
  2. Mitosis (cell division)
• What are the three stages of the cell growth phase?

  G₁, S, and G₂
• What happens during mitosis?

  A cell splits to form two identical daughter cells
• What are chromosomes?

  Condensed forms of DNA
• What occurs to chromosomes before a cell divides?

  They form and condense into chromosomes
• How do chromosomes behave during mitosis?

  They line up and are pulled apart
• What forms around the sets of chromosomes after mitosis?

  Membranes that become nuclei
• What happens to the cytoplasm during cell division?

  It divides into two new cells
• What is the genetic relationship between the two new cells after division?

  They are genetically identical
• What does the phrase "the cell cycle — nothing to do with bikes in prison" imply?

  It humorously clarifies the term 'cycle'
• How can a scientist identify cells undergoing mitosis under a microscope?

  By observing their distinct stages of division
• If a scientist counts 111 cells undergoing mitosis and 62 not, how do you calculate the percentage of cells undergoing mitosis?

  Percentage = (111 / (111 + 62)) * 100
• What is the percentage of cells undergoing mitosis if there are 111 mitotic cells and 62 non-mitotic cells?

  $64.1\%$
• What are the steps involved in mitosis?

  1. Chromosomes line up at the center
  2. Cell fibers pull chromosomes apart
  3. Membranes form around each set of chromosomes
  4. Cytoplasm divides