If cells divide into an exact replica of themselves during mitosis, then how do we get all our different cells?

Question: If cells divide into an exact replica of themselves during mitosis, then how do we get all our different cells?
- Keywords:
  cell division,
  mitosis
Asked by Newt to Carmen, Daniel, Laura, Noel, Steph on 16 Mar 2015.
- Carmen Denman answered on 16 Mar 2015:
  
  Hi there!
  
  It has to do with photon absorption! This link here below compares the material glass to wood, and explains in an easy to understand way about why we can see through one and not the other!
  
  http://humantouchofchemistry.com/why-can-we-see-through-glass.htm
  
  Best wishes,
  
  Carmen
- Noel Carter answered on 16 Mar 2015:
  
  After cell division the cells can mature into cells with different functions and properties before they then divide again to make more of the new cell type.

Newt commented on 17 Mar 2015:

Thanks! That’s really useful for EVERYTHING at the moment (tests, homework etc)

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Question: If cells divide into an exact replica of themselves during mitosis, then how do we get all our different cells?