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Mitosis and Meiosis
By Katie Smith…read more

Slide 2

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· Mitosis is where the two daughter cells in cell replication contain the same DNA as the parent cell.…read more

Slide 3

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Importance of mitosis
Mitosis is important for growth as the parent cells contain the diploid number of chromosomes so it is able to
pass all of the genetic information on to the daughter cells to ensure that the cell can be replicated in further
Mitosis is also important in cell differentiation as the daughter cells contain the same genetic information as
the parent cell. Therefore they have the same code and can function efficiently as a tissue of similar cells with
a specific function.
Mitosis is important for repair as the replicated cells can replace old and damaged ones because they have the
same genetic information and can perform the same function as efficiently as the original cell.…read more

Slide 4

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The cell cycle…read more

Slide 5

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The cell cycle and cancer
· Cancer is caused by damage to the cell's DNA which means that
cytokinesis occurs at an uncontrolled rate which creates a tumour.
· Cancer affects the rate at which cells are split so drugs that treat cancer
patients have to stop cell replication.
· This is done by preventing the replication of DNA as the cell cannot
replicate if it does not have enough genetic information to make a
genetically identical daughter cell.
· Secondly, anti-cancer drugs interupt metaphase so therefore inhibits
spindle fibre growth which without, anaphase cannot occur as the
chromatids cannot split apart.…read more

Slide 6

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· Meiosis is cell replication where 4 daughter cells are made that have half of the genetic information than
the parent cell.
1) Meiosis involves two divisions meiosis 1 and meiosis 2. In the first division, the homologous chromosomes
pair up and the chromosomes are then spilt up when the cell spilts into two with a chromosome each.
2) In the second division, the chromoatids of each chromosome are split apart and a chromosome is given to
each of the 4 daughter cells.…read more

Slide 7

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Slide 8

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Hard to understand the writing at times, but otherwise a very good resource.

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