Monday, February 28, 2011

The Process of Mitosis

Parent cell with two pairs of chromosomes

Chromosomes duplicate.
Each chromosome consists a pair of chromatids joined by a centromere.
Spindle thread emerge. Nuclear membrane gradually breaks down.

Spindle formation is complete.
Chromosomes arrange themselves at the cell equator.
The centromere of each chromosome splits and the chromatids are pulled to the opposite poles of the cell by the spindle threads.

A nuclear membrane is reformed to surround each set of chromosomes.
Cytoplasm divides
Lastly, two daughter cells are formed.
Each daughter cell has two pairs of chromosomes just like the parent cell.

We share the same parents but why are we different ????


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