# Student

Topics: Mitosis, Cell cycle, Cell nucleus Pages: 3 (868 words) Published: December 3, 2012
Determining The Relative Duration Of The Phases Of Mitosis

Mitosis is when the cell divides into 2 identical cells. It has 4 phases- prophase, metaphase, anaphase and telophase. The stage before these 4 phases is the interphase, when a cell has not yet started dividing. In this experiment, I used the root tips of onion where is the place of growth and is active in cell division, to identify the number of cells in each stage of division including interphase, and determine the relative duration of the phases of mitosis.

Result:
Determining The Relative Duration Of The Phases Of Mitosis |  | Number of Cells in Each Stage +/- 3|
Stage| Trial 1 (My result)| Trial 2| Trial 3| Trial4| Trial 5| Trial 6| Trial 7| Trial 8| Trial 9| Trial 10| Interphase| 38| 34| 41| 30| 33| 37| 20| 28| 38| 17| Prophase| 8| 16| 32| 5| 18| 6| 10| 13| 5| 12|

Metaphase| 1| 6| 0| 1| 5| 4| 7| 6| 3| 5|
Anaphase| 2| 0| 0| 1| 2| 3| 4| 3| 2| 2|
Telophase| 1| 2| 1| 9| 1| 0| 9| 0| 1| 13|
An example of calculation from ‘the number of cells in each stage +/- 3’ and ‘the relative duration of each stage (%): Trial 1 (my result) Prophase ->(8/50)*100 because I observed 50 cells in onion tip in total, and there were 8 cells at the stage of prophase. I multiplied 100 to get the % duration of this stage.

An example of calculation from ‘the number of cells in each stage +/- 3’ and ‘the relative duration of each stage (%): Trial 1 (my result) Prophase ->(8/50)*100 because I observed 50 cells in onion tip in total, and there were 8 cells at the stage of prophase. I multiplied 100 to get the % duration of this stage.

Determining The Relative Duration Of The Phases Of Mitosis |  | The Relative Duration Of Each Stage (%)|
Stage| Trial 1 (My result)| Trial 2| Trial 3| Trial4| Trial 5| Trial 6| Trial 7| Trial 8| Trial 9| Trial 10| Interphase| 76| 59| 55| 65| 56| 74| 40| 56| 78| 35...