2010-2011 Science: 3-4 Cell Growth and Division

  1. Phase 6: Two Daughter Cells Form

    -called cytokinesis
    -the division of cytoplasm in the cell
    -the membrane surrounding the cell begins to move inward until the cytoplasm is pinched into two nearly equal parts
    -each part contains a nucleus with identical chromosomes
    -the cell membrane forms and two new daughter cells are produced
    -in plant cells, a cell wall forms
  2. Phase 5: Two New Nuclei Form

    -called telophase
    -chromosomes begin to uncoil and lose their rodlike appearance
    -the chromosomes again become the chromatid and a nuclear membrane forms around the chromatin at each end of the cell
    -in each nucleus a nucleolus reappears
    -the process of mitosis is now complete
  3. Phase 4: Chromosomes Begin to Separate

    -called endophase (SP?)
    -one chromatid moves to one end of the cell along the spindle
    -the other chromatid goes the other direction
    -the chromatids are again called chromosomes
  4. Phase 3: Chromosomes Attach to the Spindle

    -called metaphase
    -chromosome attach to the spindle (the "bridge")
    -chromosomes are attached to the spindle by the centromere, which connects each chromatid to its identical sister
  5. Phase 2: Mitosis Begins

    -called prophase
    -the process of cell division is now called mitosis
    -prophase (mitosis) is the process in which the nucleus of a cell divides
    -the threadlike chromatin in the nucleus begin to shorten and form rodlike chromosomes
    -two centrioles (only in animal cells) begin to move to opposite sides of the cell
    -a mesh-like spindle begins to develop between the two centrioles forming a "bridge" between opposite ends of the cell
    -the nuclear membrane begins to breakdown, and the nucleolus disappears
  6. Phase 1: Chromosomes Are Copied

    -Called Interphase
    -the cell is preforming its life functions, but isn't actually dividing
    -chromosomes would appear in threadlike coils called chromatin
    -in animal cells, two structured called centrioles can be seen outside the nucleus, they play a part in cell division
    -plant cells don't have centrioles
    -chromosomes duplicate (numbers are doubled)
    -each chromosome is attached at an area called the centremere
    -the sister chromosomes are now called chromatids
  7. Cell Division

    During cell division one cell divides into to new cells
    -Each new cell, called a daughter cell, is identical to the other daughter and parent cell
    -Cell division occurs in a series of stages, or phases
  8. Limits On Cell Growth

    At some point the cell membrane would not be able to handle the flow of materials passing through it
Card Set
2010-2011 Science: 3-4 Cell Growth and Division
Science; Mrs Deschene; Chapter 3 Lesson 4; Cell Growth and Division; For Test on December 10, 2010