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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.
Now weâre going to do an experiment to determine how much time cells spend in each phase of cell division. Letâs count the number of cells in some onion root tips during each phase, and use this information to answer the question. On this slide, there are 21 cells in interphase, 4 in prophase, 2 in metaphase, and 1 in telophase. Why are most of the cells in interphase? Recall that interphase makes up the majority of the cell cycle. Letâs look at another slide. In this slide, there are 16 cells in interphase, 1 in prophase, and 1 in anaphase. Go ahead and try characterizing the cells yourself. Good job! Good going! Youâve got it! Nicely done! Thatâs right! Sorry, thatâs not correct. This cell is in interphase.