3.24 Mitosis

Mitosis is a form of cell division -> result in growth occurs by increase of numbers of cells


Diploid (2n) = number of chromosomes 


Cell will divide in 2 cells each with a nucleus where they both will have diploid nucleus = Cell identical(1. Same number of chromosomes
2. Same set of chromosomes)


Copy of chromosomes = DNA replication ->creates 2 Copy of the each chromosomes which it hold together by the centro-mere. 


Chromosomes will be pair = ' pair of chromatids'


DNA replication take place in the nucelus while it still intact = INTERphase of the cell cycle


Stages of mitosis 


1.Prophase = The break down of nucleus  ( pair of chromatids are visible)
2. Late Prophase = After the nucleus gone, the protein in the cell called spindle extend one pole of the cell to another. 
3. Metaphase = The pair of chromatids move towards the spindle and join one of the spindle fibre by the centro mere. 


4. Anaphase = The Spindle fibre shorten and pull the chromatics apart each other towards each pole. ( separation of the pair of chromatic)


5. Telophase = The nucleus reformed around the chromosomes = new nucleus. Shows the formation of two nuclei at opposite ends of the cell.


6.CytoKinesis = Cell splits into 2. (Not part of mitosis)