3.) The percentage of cells in each phase or stage can be used as a measure of how long each phase lasts. The cell cycle in onion cells takes 1,440 minutes (24 hours), so if you take the percentage of cells in each
phase and convert it to a decimal figure by dividing by 100 and then multiply the amount of time the cell
cycle takes, you can calculate the approximate time each stage or phase of the cell cycle lasts.
Formula: Duration of phase (in minutes) = percentage/100 X 1,440 minutes