Mitosis

Cell division

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

2 daughter cells identical to original

Parent cell

Chromosomes are copied and double in number

Chromosomes now split

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 slides1 2

3 4 5

Parent cell Chromosomes copied

Copies separating 2 daughter cells

Cells split

Plants

apical meristem

Rat – epithelial cells

Cell membrane