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03.01 Cell Cycle & Mitosis

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by

Christopher Olsen

on 2 August 2014

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Transcript of 03.01 Cell Cycle & Mitosis

03.01 Cell Cycle & Mitosis
Safety Notes
Always handle microscopes and glass slides carefully.
Wash your hands after handling the prepared specimans
Purpose
Hypothesis
Data and observations
Conclusion
Based on your data, what can you infer about the length if the time spent in each of the cell cycle?
Conclusion Continued...
If your observation had not been restricted to the tip of the onion root, how would the rusults be different?
All of the cells would have probably been in interphase.

Materials
Compound light microscope
glass microscope slide with prepared onion root tip specimen
Understand and identify the stage of the cell cycle and mitosis.
Apply and analytical technique to estimate the relative legnth of each stage of the cell cycle.
I predict that there will be more cells in metaphase than in any other phase.
Stage

Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis

Number of cells
in part 1

34
8
3
2
2
1


Part 2

49
13
4
3
4
3
Data Analysis
Part 1
Interphase
Prophase
Metaphase
Anaphase
Telophase
Cytokinesis
68%
16%
6%
4%
4%
2%

Part 2
66%
17%
5%
4%
5%
4%
I can infer that the cells spend most of the time in interphase and spends less time in in each stage as the cycle continues.
What stages were the longest and the shortest?
The longest stage is interphase, with anaphase being the shortest becuase it doesnt last very long.
What is a distinguishing visisble feature of each stage of the cycle?
The position of the chromosomes


What differences can you see when you compare the nucleus of a dividing cell with that of a nondividing cell?
the chromosomes are visible when a cell is dividing as oppose to nondividing cells.
Full transcript