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4. __Long Arms_________. Most eukaryotic cells spend most of their time in interphase. For example, human skin cells, which divide about once a day, spend roughly 22 hours in interphase. About 90 percent of cells are in interphase. Some cells, such as nerve cells, can stay in interphase for decades.
Each cell has two copies of each chromosome before it divides. Many cells in one stage of mitosis means that that stage takes a long time to complete. During interphase the nucleus of the cell is intact. This phase takes about 80 percent of the time required to complete the cell cycle. During cell division, the nucleus disappears after prophase. Cell division does not take a long time.Prophase is the longest phase of mitosis, but it occurs faster than interphase. Anaphase is the shortest phase of mitosis. In anaphase, the sister chromatids are pulled apart to opposite ends of the cell.