Mitosis
Cell division
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Cell division
All complex organisms
originated from a single
fertilised egg.
Every cell in your body
started here, through cell
division the numbers are
increased
Cell then specialise and
change into their various
roles
Mitosis
• Mitosis is the process by which new body
cell are produced for:
– Growth
– Replacing damaged or old cells.
This is a complex process requiring different
stages
Parent cell
Chromosomes are
copied and double
in number
Chromosomes
now split
2 daughter cells
identical to original
Mitosis
• All daughter cells contain the same genetic
information from the original parent cell from
which it was copied.
• Every different type cell in your body
contains the same genes, but only some act to
make the cells specialise – e.g. into nerve or
muscle tissue.
Mitosis – bone cell slides
1
2
Chromosomes
copied
Parent cell
3
Copies separating
Cells
split
4
5
2 daughter cells
Plants
apical
meristem
Rat – epithelial cells
Cell membrane