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Cell division

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CELL DIVISION CELL DIVISION
Cell division – what is it for? ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
DNA replication ,[object Object],[object Object],[object Object],[object Object]
DNA needs to copy exactly ,[object Object],[object Object],[object Object],[object Object],[object Object]
 
What happens next? ,[object Object],[object Object],[object Object],[object Object],[object Object]
Mitosis
Meiosis ,[object Object],[object Object]
Differences between mitosis and meiosis Mitosis Meiosis Number of parent cells 1 1 Number of daughter cells 2 4 DNA and genes in daughter cells Exactly the same as parent cells Different from parent cells Number of chromosomes in daughter cells 2n = 46 n = 23 Purpose Growth and repair Reproduction
Why 23 chromosomes? ,[object Object]
Cell Division – mitosis and meiosis ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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Cell division

  • 2.
  • 3.
  • 4.
  • 5.  
  • 6.
  • 8.
  • 9. Differences between mitosis and meiosis Mitosis Meiosis Number of parent cells 1 1 Number of daughter cells 2 4 DNA and genes in daughter cells Exactly the same as parent cells Different from parent cells Number of chromosomes in daughter cells 2n = 46 n = 23 Purpose Growth and repair Reproduction
  • 10.
  • 11.