Wednesday, August 24, 2011

3.24 b - Mitosis




detail of mitosis: 

first cell has to copy its chromosomes in order for the two split cells to have he same number of chromosomes and same sets 
-  this is DNA replication (copy chromosomes) 
- DNA replication - each chromosomes undergoes copying process. held together by centromere. 
- they are now a 'pair of chromatids' 
- takes place in the nucleus while it is still intact - interphase of the cell cycle 



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