Mitosis:

Cell division for any cell to create new cells in order to grow or repair. Produces 2 daughter cells which are identical to the original cell.

1)The 46 chromosomes in a cell duplicate to form 46 chromosomes which each consists of 2 chromatids bound by a centromere.

2)The chromosomes move to the centre of the cell, the 2 chromatids of each chromosome split at the centromere, creating 92 chromosomes. 46 chromosomes go to either side of the cell.

3The cell splits creating 2 cells each with 46 chromosomes, they are both identical to the original cell.

Meiosis

Cell division for cell used in reproduction (germ cells), it creates 4 daughter cells that each have 23 chromosomes, none are the same as the original cell.

1)46 chromosomes duplicate to form 46 chromosomes that consist of 2 sister chromatids bound with a centromere.

2)The chromosomes pair with another chromosome from the other parent to form 23 homologous pairs, each homologous pair consists of 2 chromosomes (each chromosome consists of 2 sister chromatids)

3)These 23 homologous pairs line up and exchange genetic material.

4)These 23 homologous pairs split in the cell and form 46 chromosomes which have a mix of genetic material, half at each side of the cells.

5)The cell splits and forms two cells with 23 chromosomes with a mix of genes.

6)In each cell, the centromeres connecting the chromatids of the 23 chromosomes split producing 46 chromosomes at either side of the cell.

7)Both cell splits producing, in total, 4 gametes with 23 chromosomes each.

	Created by George Moores about 9 years ago

Note on Mitosis and miosis, created by George Moores on 05/02/2015.