Download - AP Biology Mitosis investigation
Mitosis Investigation
AP Biology
This report needs:1.Title2.Null Hypothesis3.Figure 14.Tables 1, 2, 35.Conclusion
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.
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.
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
ResultsInterphase Prophase Prometaphas
eMetaphase Anaphase Telophase
Total Cells
Total Mitosis:
Table 2. Class Data for Cells
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
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.