Mitosis:
Cell cycle = interphase and division phase
Interphase = the cells normal and usual metabolic activities. They start when the cell
is formed and end when the division phase starts
Functions of mitosis
To aid with growth of an organism
Replacement of damaged or worn tissue/cells
Reproduction of unicellular organisms
Process
Prophase:
Chromatin material shortens and thickens, becoming visible as chromosomes
DNA has replicated itself
The nuclear membrane disappears and nucleus disintegrates
organelles move away from the nucleus, centrioles double and move to opposite
poles
spindle fibres appear between centrioles
Metaphase
chromosomes are now on the equatorial level of the cell
spindle fibres attach to centromeres of chromosomes and pull chromosomes to the
centre of the cell
Anaphase
spindle fibres shrink and split the centromere in 2, separating the chromatids
chromatids move to opposite poles
Telophase
unreplicated chromosomes join to form a chromatin network
nuclear membrane and nucleolus reappear
invagination forms 2 separate cells
nucleus division = karyokinesis
cytoplasm division = cytokinesis
plant cells divide by cell plate forming an equator.
by Unknown Author is licensed under
Cell cycle = interphase and division phase
Interphase = the cells normal and usual metabolic activities. They start when the cell
is formed and end when the division phase starts
Functions of mitosis
To aid with growth of an organism
Replacement of damaged or worn tissue/cells
Reproduction of unicellular organisms
Process
Prophase:
Chromatin material shortens and thickens, becoming visible as chromosomes
DNA has replicated itself
The nuclear membrane disappears and nucleus disintegrates
organelles move away from the nucleus, centrioles double and move to opposite
poles
spindle fibres appear between centrioles
Metaphase
chromosomes are now on the equatorial level of the cell
spindle fibres attach to centromeres of chromosomes and pull chromosomes to the
centre of the cell
Anaphase
spindle fibres shrink and split the centromere in 2, separating the chromatids
chromatids move to opposite poles
Telophase
unreplicated chromosomes join to form a chromatin network
nuclear membrane and nucleolus reappear
invagination forms 2 separate cells
nucleus division = karyokinesis
cytoplasm division = cytokinesis
plant cells divide by cell plate forming an equator.
by Unknown Author is licensed under
