Mitosis: A Recap
Mitosis is a type of cell division that produces two daughter cells that are genetically identical to the parent cell. It's essential for growth, repair, and development.
The Stages
1. Interphase: This is the stage before mitosis where the cell grows, duplicates its chromosomes, and prepares for division. The chromosomes now consist of two identical sister chromatids held together by a centromere.
2. Prophase: The chromosomes condense and become visible. The nuclear envelope breaks down, and the spindle fibers form.
3. Metaphase: The chromosomes line up at the center of the cell, attached to the spindle fibers at their centromeres.
4. Anaphase: The sister chromatids are pulled apart by the spindle fibers to opposite poles of the cell.
5. Telophase: The chromosomes reach the poles, the nuclear envelope reforms around each set of chromosomes, and the cell begins to divide.
6. Cytokinesis: The cytoplasm divides, forming two separate daughter cells, each with its own nucleus.
Result
After mitosis, the original cell with 10 chromosomes will produce two daughter cells, each with 10 chromosomes. Each chromosome in the daughter cells will be identical to one of the chromosomes in the original cell. This is because the chromosomes were duplicated during interphase.
Key Point: The number of chromosomes remains the same after mitosis. The process ensures that each new cell receives a complete set of genetic material.
