AP Biology Mitosis investigation Lab Report
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Transcript of AP Biology Mitosis investigation Lab Report
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Mitosis Investigation
AP Biology
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This report needs:1.Title2.Null Hypothesis3.Figure 14.Tables 1, 2, 35.Conclusion
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Null Hypothesis If mitosis is 10% of the cell cycle, then 10% of the observed cells will be in one of the stages of mitosis.
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ResultsInterphase (G1,
S, G2)
prophase
prometaphase
metaphase
anaphase
telophase
Sketch an accurate image for each boxFigure 1. Allium
root tips in the different stages of the cell cycle.
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ResultsInterphase Prophase Pro-
metaphase
Metaphase
Anaphase Telophase
Root Tip one
Root Tip two
Root Tip three
Total for all 3 Root Tips
Table 1. Number of cells in each phase
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ResultsInterphase Prophase Prometaphas
eMetaphase Anaphase Telophase
Total Cells
Total Mitosis:
Table 2. Class Data for Cells
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Results
Group Observed (o)
Expected (e)
(o-e) (o-e)2 (o-e)2________ e
InterphaseMitosis Ʃ
df = 1 p = 0.05
Table 3. Chi-square analysis of Allium root tip cells
Critical value 3.84
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Discussion/ ConclusionWhat happened?
How many cells in mitosis? How many cells did we EXPECT to have in mitosis?
Why? Why does this part of the plant have a lot of cells in mitosis or why did this tissue sample match our expected data?
Do we accept or reject the null hypothesis? Why? Explain what the Chi-square test tells us.