mitosis

1. cell Nucleus Chromosomes

2. Nucleus cell Newly developed chromosome chromosome

3. Prophase begins Cell membrane breaks down More chromosomes

4. spindle

11. Cancer and Mitosis Cancer is caused by unregulated mitosis. The normal “checkpoints” of regular mitosis are ignored or overridden by the cancer cell. Cancer begins when a single cell is transformed, or converted from a normal cell to a cancer cell.