Prophase is the first phase of mitosis, this when the nuclear envelope breaks down and the nucleuse disappears. Hope I was able to help. :)
The nucleus disappears and the nuclear envelope breaks down during prophase, the first phase of mitosis, allowing the chromosomes to condense and the cell to prepare for division. ;
During prophase, the nucleus disappears and the nuclear envelope breaks down as the cell prepares for mitosis. Chromatin condenses into visible chromosomes, and centrosomes move to opposite poles while developing the mitotic spindle. This phase is essential for the organization and separation of genetic material during cell division.
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