In this activity, you will be presented with cells from the tip of an onion root. You will classify each cell based on what phase it is in. At the end you will count up the cells found in each phase and use those numbers to predict how much time a dividing cell spends in each phase. You can base your calculation on a total cell cycle of 24 hours. + You can enter data in this table as you go along, or at the end of the activity.
Interphase Prophase Metaphase Anaphase Telophase/Cytokinesis Total Number of cells 20 10 3 2 1 36 Percent ofcells 55.56% 27.78% 8.33% 5.56% 2.77% 100% 4. Use your percentages to create a graph (on a separate sheet) of the amount of time a cell spends in each stage of cell division, based on a 24 hour day (or 1,440 minutes)
Percent of cells in stage X 1,440 minutes = spent in stage minutes of cell cycle