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Cell division

  1. Apr 30, 2005 #1
    An embryo can increase its cell number without increasing
    its overall size.Is this because cell growth is actively inhibited?
  2. jcsd
  3. May 1, 2005 #2


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    Do you mean increasing the size of the embryo, or decreasing the size of the cell?
  4. May 1, 2005 #3
    I mean keeping the embryo the same size but increasing the cell number,
    presumably just by increasing the number of cell walls.
  5. May 1, 2005 #4


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    The constant size of the embryo is due to the rapid division of the cells. The cell goes through a rapid a cell cycle which abolish the growth period between DNA replication steps (i.e. no G1 or G2 phase). The G1 and G2 phase can be abolish because the egg is an oversize cell.
  6. May 1, 2005 #5
    What stops G1 and G2?
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