The stages of Mitoisis AS Biology

hope it helps just  a quick over view

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Interphase

this can be the first or last process in the cell cycle as it is a cycle 

in this phase the cell 

  • makes DNA 
  • produces the ATP needed for the cell to divide as this is a high energy process
  • produces more organelles
  • replication of centrioles
  • the cell grows 

this  is the longest stage of the cell cycle ( the length of the cell cycle varies from cell to cell)

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Propahse

 chromosomes start to shorten and thicken up and become visable under a light microscope and the centrioles move to opposite poles of the cell and will form the spindel fibres 

by the end of this phase the sister chromatids are joined at the centromere ( at the centre of the two lengths)

at the very end the nuclear membrane ( into lysosomes) and the nucleolus will dissappear so the chromosomes are free in the cytoplasm

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Metaphase and Anaphase

Metaphase

in this stage the chromosomes line up at  the equator of the cell along the line of the equator the spindle then attaches itsself to the centromere ready to pull the chromatids apart this is a short stage of mitosis

Anaphase

is also a short stage of mitosis, where  the chromosomes are pulled apart as the spindle shortens and takes the chromatids to the poles

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Telophase

the chromatids have reached the poles so can now be seen as chromosomes again .the cells splits into two and the nuclear envelope reforms around the chrosmosomes which will now unwind

the cytoplasm splitting is called cytokinesis the splitting hppens along the equator of the cell when a division furrow goes all the way through the plane of the equator

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uses of mitosis in the body / in animals

  • for growth and repaair 
  • asexual reproduction 
  • repair of tissues

it will produce genetically identical cells which are dipole cells meaning that they have the full number of chromosomes 46 

a good way of remebering the stages bar interphase is 

Polly Made Apple Tart

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