IGCSE Chemistry

IGCSE Chemistry

Tuesday, November 12, 2019

3.28 understand how division of a diploid cell by mitosis produces two cells that contain identical sets of chromosomes

Mitosis is when a cell reproduces by splitting itself in 2 to form 2 cells with identical sets of chromosomes. (definition for exams)

This means that when a diploid cell (46 chromosomes) divides by mitosis, 2 diploid cells (both identical 46 chromosomes) result. This is how it works:

1. Prior to mitosis, DNA replication occurs to form 2 copies of each chromosome in the cell.
2. Mitosis begins with the breakdown of the nuclear membrane.
3. Fibers attach to each set of chromosomes, pulling them to each end of the cell to form 2 individual nucleus.
4. Cytoplasm and cell membrane divides along the nucleus, resulting in 2 identical diploid daughter cells.

This process is split to 6 steps:
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