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Quick question about cell division

  1. Aug 2, 2010 #1
    Hello everyone,

    When a cell divide, do the organalles divide, or does DNA divide first, and using that DNA information new cells synthesize organalles. Thanks :smile:
     
  2. jcsd
  3. Aug 4, 2010 #2
    In mitosis for eukaryotes , the some entire organelles (mitochondria chloroplasts) are inherited by each daughter cell, some can fragment (Golgi, ER). Membrane bound organelles such as chloroplasts and mitochondria must be intact in order to grow and divide into new organelles. When mitosis occurs the cell has enough of each organelle to allocate to each new cell. They are inherited as full and intact to the new cells. Endoplasmic reticulum and Golgi are able to form from fragments, and when mitosis begins they probably fragment and are inherited as fragments by each new cell.
    I hope that answers your question, but just to clarify -
    Organelles are growing and dividing during interphase before a cell divides
    Mitochondria and chloroplasts actually have their own DNA, the cell DNA in the nucleus can not form new organelles of this type, they MUST be inherited from the previous cell.
    I'm not totally sure about ER and Golgi but my guess is they must be inherited as well because the new cells can not synthesize them.
     
    Last edited: Aug 4, 2010
  4. Aug 4, 2010 #3

    Monique

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    There is also the idea that the mitotic spindle plays a role in organelle partitioning during cell division:
     
    Last edited by a moderator: May 4, 2017
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