1.7 - Mitosis

• What are the three stages of the cell cycle?

  Growth

  DNA Replication and Mitosis

  Division (Cytokinesis)
• What is the first step in the process of mitosis?

  Chromosomes condense to form chromatin
• What do chromatin condense to form during mitosis?

  Chromosomes
• How do chromosomes line up during mitosis?

  Along the middle of the cells
• What do cell fibers do during mitosis?

  Pull chromosomes to opposite sides
• What is the result of cytokinesis?

  Formation of two identical daughter cells
• What is the role of cytokinesis in cell division?

  It divides the cytoplasm into two cells
• What are the steps of mitosis?

  1. DNA condenses into chromosomes
  2. Chromosomes line up along the cell's middle
  3. Cell fibers pull chromosomes to opposite sides
  4. Cytokinesis occurs, forming two daughter cells
• What do multicellular organisms require for growth?

  A continuous supply of new cells
• Why do multicellular organisms need a continuous supply of new cells?

  To support growth and replace old cells
• What are the three reasons why new cells are required?

  Growth (need more cells as we grow)

  Development (new cell types for new tissues)

  Repair (replace the cells we lose every day)
• What are the steps of the cell cycle?

  1. Cellular growth - cell gets larger and produces more subcellular structures.

  2. DNA Replication - chromosomes duplicate, so each consists of two arms.

  3. More cell growth

  4. Mitosis - the DNA divides into two.

  5. Cytokinesis - the cell divides into two.
• Are the cells created by mitosis genetically identical to each other or genetically different?

  genetically identical
• When a cell divides by mitosis, how many cells are produced?

  2