Summarize the major event(s) that occur(s) during:
1.
G1 (of Interphase)
2.
G1 checkpoint
3.
S-phase (of Interphase)
4.
G2 (of Interphase)
5.
G2 checkpoint
6.
M checkpoint
7. What does G0 mean and which type of cells stay in this phase of the cell cycle?
Add the following labels to the diagram and graph above:
14. List three uses for the mitotic cell-division:
8. G1
9. S (DNA synthesis)
15. How does the DNA of one of your skin cells compare
to one of your neurons (nerve cells)?
10. G2
11. M (for mitotic-phase)
16. How does a stem cell differentiate into a skin cell
versus a neuron or muscle cell?
12. Add the label “alignment” to the diagram
13. Add the label “separation” to the diagram
Cell Type
A
B
C
G1
50
93
100
% of cells found in each phase of the cell cycle
S
G2
25
15
5
1
0
0
17. Which cell-type is quickly dividing such as stem-cells that replace blood cells?
18. Which cell-type is in G0 such as mature cardiac muscle cells?
19. Which cell-type can divide on occasion such as liver cells?
M
10
1
0
Control
Mitotic-phase
Interphase
Total # of Cells
Count
16
47
Treatment
% of Cells
N/A
Count
59
64
% of Cells
N/A
20. Researchers wanted to know if treatment with a specific chemical would affect the ate of mitosis in onion root tip
cells. They treated one root-tip with willow-bark extract (treatment) and compared it to one control (untreated)l root
tip. The data for the treatment root-tip is shown in the data table above.
a. Use the data provided to complete the data table provided to you for part (a).
b. Make a claim about the effect of the treatment on the rate of cell-division and justify with evidence
(quantitative measurement) from your data table.
c. Suggest one improvement that would increase the validity/confidence of the claim that you made in part (b)
above. 1 pt.
Add the following labels to the diagram and graph
above:
30. List four ways that genetic diversity is generated in
sexually reproducing organisms:
20. G1
21.S (DNA synthesis)
22. G2
31. How many unique sperm/egg could an organism with six
pairs of homologous chromosomes produce through
independent assortment? Show both set-up and final
answer:
23. MI
24. M2
Add the following labels to the diagram above:
25. Separation of homologous chromosomes
26. Separation of sister chromatids
32. Summarize the advantages and disadvantages of asexual
and sexual reproductive strategies:
27. Which meiotic division is responsible for diploid →
haploid?
28. Which gametes have the normal number of chromosomes? Which do not?
29. How could this have occurred and what could be the result for the offspring?