Mitosis Lab

Steven Chau
Jason Ly
Thompson Wu
I.
Title
: Observing Mitosis – Onion Root Tip and Whitefish Blastula
V.
Observations:
175 cells 1. What percentage of the cells in the field of view is going through mitosis? 10% Relative Duration of Each Phase of Mitosis – Onion Root Tip
Phase of Mitosis

Count

Percentage

Time (min.)

Prophase

3

14%

11

Metaphase

2

9%

7

Anaphase

5

23%

19

Telophase

12

54%

43

Total

22

100%

80

Relative Duration of Each Phase of Mitosis – Whitefish Blastula
Phase of Mitosis

Count

Percentage

Time (min.)

Prophase

14

74%

1066

Metaphase

3

16%

230

Anaphase

0

0%

0

Telophase

2

10%

144

19

100%

1440

Total

VI.

Percentage
Percentage = number in phase x 100 total #
Onion Root Tip
Duration of phase (in min.) = percentage x 80 min. 100
Whitefish Blastula
Duration of phase (in min.) = percentage x 1440 min. 100
Conclusion:

According to the data table, Prophase took the most amount of time in the
Whitefish Blastula, but in the Onion Root tip, prophase took the most amount time. In the Onion Root tip, the cell spends about 43 minutes in Telophase, while in the Whitefish Blastula the cells takes approximately 1066 minutes in Prophase.

According to the data table, Anaphase took the least amount of time in the
Whitefish Blastula, but in the Onion Root tip, metaphase took the least amount of time. In the Onion Root tip, the cells spends around 7 minutes in Metaphase, meanwhile in the Whitefish Blastula the cell takes 0 minutes in Anaphase because there were no cells going through Anaphase within the Whitefish
Blastula at that moment.

Smaller samples might not work with the assumption because the sample would not have enough data or cells for an accurate percentage of cells in that phase at that moment. Since one cell could drastically change the