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Cell cycle goes through three processes:

  • Interphase
  • Mitosis
  • Cytokinesis

Why are chromatins not condensed during interphase but instead condensed at prophase of mitosis? What makes them condense at prophase?

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  • $\begingroup$ What resolution answer are you looking for here? Chromatin is complicated. If it was condensed during interphase, how would it be used? It would be folded up and inaccessible. $\endgroup$
    – Resonating
    Nov 6 '15 at 21:47
  • $\begingroup$ but then why is it condensed in prophase? and I still don't understand why are they condensed at prophase? $\endgroup$
    – micheal
    Nov 6 '15 at 21:53
  • $\begingroup$ So that it can be partitioned neatly into daughter cells. If I understand correctly, your question boils down to "why is chromatin condensed at all?" ? $\endgroup$
    – Resonating
    Nov 6 '15 at 22:25
  • $\begingroup$ exactly. Also what makes them not condensed at Interphase? $\endgroup$
    – micheal
    Nov 6 '15 at 22:27
  • $\begingroup$ This question is far too broad. From What types of questions should I avoid asking? in the help center: "If you can imagine an entire book that answers your question, you’re asking too much." I suggest reading the Wikipedia article on chromatin and the linked articles on, for example, the structure of DNA. $\endgroup$
    – MattDMo
    Nov 7 '15 at 21:05
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Here's an image that explains the cell cycle:

enter image description here

And here's one that explains Mitosis as a subcategory of the cell cycle:

enter image description here

Chromosomes condense on the metaphase plate before they are pulled apart by kinetochore microtubules in a Tug-of-war. Chromosome condensation is not yet fully understood, but nucleosome structure is hypothesized to play a role. This is a very good question and is definitely not too broad.

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