Most cells in the body go through a cell cycle. This cycle is tightly controlled and it has four stages.
Mitosis is the final stage of the cell cycle.
We can use this formula to calculate the length of different stages of the cell cycle:
So, to calculate the length of time a cell spends in a specific stage, divide the observed number of cells in that stage by the total number of cells observed. Then, multiply this by the total length of the cell cycle.
Mitosis is a type of cell division that produces two identical diploid daughter cells. The daughter cells produced from mitosis are clones of each other, which means their DNA is identical.
They are also genetically identical to the parent cell. This way all your cells have an identical DNA composition.
REMEMBER! There are 23 pairs of chromosomes in each cell of the body
The stages of mitosis are prophase, metaphase, anaphase and telophase.
Interphase – This phase must happen before Mitosis begins. G1, S and G2 stages of the cell cycle occur during interphase. The cell spends most of its life in this phase. Before mitosis can produce two diploid cells from one, the DNA in chromosomes must replicate. This ensures that chromosome numbers remain consistent after cell division
1. Prophase – The chromosomes and their copies condense to become more visible. Also, the membrane around the nucleus disappears.
2. Metaphase – Chromosomes and their copies line up in the middle of the cell.
3. Anaphase – Chromosomes and their copies are pulled to different ends of the cell.
4. Telophase – New membranes form around the chromosomes at each end of the cell. The cell membrane pinches in and eventually divides into two daughter cells, which is called cytokinesis.
Mitosis is continuously occurring throughout our bodies.
Mitosis produces new cells and replaces cells that are old, lost or damaged. For you to stay alive and fully functional, these cells need to be continuously replaced. Mitosis is the reason we can grow, heal wounds, and replace damaged cells.