The study observed the phases of cell division in onion root tip cells under a microscope and recorded the number of cells in each phase. It then calculated the average time for each phase of mitosis based on prior studies. Finally, it compared the observed and expected ratios of cells in each phase and found them to be consistent within experimental error.

1. Research Question:Doesthe studyof cellsthroughthe microscope agree withthe timesrate of cell
divisioninthe roottipof Allium cepa, the commononion.
Data Collection& Processing:
Table 1: DifferentFieldObservingandDeterminingeachPhase in Mitosis
Fields Interphase Prophase Metaphase Anaphase Telophase
1 11 - - 1 -
2 20 1 - 1 -
3 16 - - 1 -
4 13 - - - -
5 12 2 1 - -
6 14 1 - - -
7 20 1 - 1 1
8 24 4 - - 1
9 19 3 - - -
10 20 - - - -
Table 1:The table illustrates the numberof phasesdetermined in the onion cell. Asshown majority cells
are in Interphaseand theshortestis Metaphase.
Interphase:785 minutes~ 883 minutes
Average:(785 min+ 883 min)/2 = 834 minutes
Prophase:60 minutes ~ 120 minutes
Average:(60 min+ 120 min)/2 = 90 minutes
Metaphase:5 minutes~ 105minutes
Average:(5min+ 15 min) /2 = 10 minutes
Anaphase:2 minutes~10 minutes
Average:(2min+ 10 min) / 2 = 6 minutes
Telophase:10minutes~ 30 minutes
Average:(10 min+ 30 min) /2 = 20 minutes
Average time tocomplete the cell cycle is960 minutes
I:P:M:A:T(Observation) =I:P:M:A:T(Expected)
169:12:1:4:2 = 834:90:10:6:20
Interphase Prophase Metaphase Anaphase Telophase
= 0.197 + 1.795 + 0.4687 + 6.792 + 0.937
= 10. 1897

2. Conclusion