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Mitosis- By Kirsty Rigley
Mitosis makes new cells for Growth and Repair. Furthermore, body
cells normally have two copies of each chromosome; they get one
copy of each chromosome from the `mother' and the other from
the `father'. To continue, humans have two copies of chromosome 1
and two copies of chromosome 2. All together humans have 23 pairs
of chromosomes.
When a body cell divides, it needs to make new cells identical to the
original cell- with the same number of chromosomes. This type of
cell division is called mitosis. Mitosis happens in plants and animals.
Lastly, it happens when they want to grow or replace cells that have
been damaged.
This is how it occurs;
1. A cell with two sets of chromosomes.
2. The DNA is copied and forms X-shaped chromosomes. Each
`arm' of the chromosomes is an exact copy of the other.
3. The cell divides once.
4. You now have two new cells containing exactly the same DNA-
they're identical.


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