Question
nucleus of cell disappears and chromosomes divide
Answers
GPT-4o mini
The process you are describing sounds like it is part of cell division, specifically mitosis. During mitosis, the following key events occur:
1. **Prophase**: The chromatin condenses into visible chromosomes, and the nuclear envelope begins to break down. The mitotic spindle starts to form.
2. **Metaphase**: The chromosomes align at the cell's equatorial plate, and fibers from the spindle apparatus attach to the centromeres of the chromosomes.
3. **Anaphase**: The sister chromatids are pulled apart toward opposite poles of the cell as the protein fibers shorten.
4. **Telophase**: The separated chromosomes begin to de-condense back into chromatin, and the nuclear envelope re-forms around each set of chromosomes at the poles.
In summary, the phrase "nucleus of cell disappears and chromosomes divide" refers most closely to the earlier stages of mitosis, particularly prophase and anaphase, during which the nuclear envelope breaks down, and the chromosomes are separated and moved to opposite ends of the cell. Following these stages, the cell will then proceed to cytokinesis, where the cell divides into two daughter cells.
1. **Prophase**: The chromatin condenses into visible chromosomes, and the nuclear envelope begins to break down. The mitotic spindle starts to form.
2. **Metaphase**: The chromosomes align at the cell's equatorial plate, and fibers from the spindle apparatus attach to the centromeres of the chromosomes.
3. **Anaphase**: The sister chromatids are pulled apart toward opposite poles of the cell as the protein fibers shorten.
4. **Telophase**: The separated chromosomes begin to de-condense back into chromatin, and the nuclear envelope re-forms around each set of chromosomes at the poles.
In summary, the phrase "nucleus of cell disappears and chromosomes divide" refers most closely to the earlier stages of mitosis, particularly prophase and anaphase, during which the nuclear envelope breaks down, and the chromosomes are separated and moved to opposite ends of the cell. Following these stages, the cell will then proceed to cytokinesis, where the cell divides into two daughter cells.