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Mr.Sands
Science 9
Biology Unit
Chapter 5 – Mitosis and Asexual Reproduction
Pages 150 - 185
Name: _____________________
Date: ____________
Block: ________
Section 5.1 – The Cell Cycle and Mitosis – pages 150 - 165
1. How many cells do you have in your body? How many new cells does your body
produce every minute?
2. Why do some cells divide often, while others divide either do not divide in adult life,
or do so after many years?
3. List the three stages of the cell cycle and describe each.
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4. What is the longest stage in the cell cycle?
5. What three events take place during interphase?
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6. What occurs in the first phase of interphase?
7. Explain what happens in the replication phase of interphase. Why is DNA
replication so important?
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8. Why is chromatin in its loosely coiled form during interphase?
9. In the final stage before cell division, what organelles will be duplicated and why?
10. Define mitosis:
11. What does the chromosomes look like during prophase?
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12.
In
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MITOSIS
the boxes below
name each phase of mitosis
draw what is happening in the phase
describe what is happening in the phase
Phase 1: __________________________
Phase 2: _________________________
Description: ________________________ Description:________________________
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Phase 3: __________________________
Phase 4: _________________________
Description: ________________________ Description:________________________
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13. Is mitosis constantly occurring in your cells? Explain.
14. Why must the nuclear membrane break down for mitosis to occur?
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15. Why do you think it is important that DNA is compact and tightly coiled during
mitosis?
16. What might happen if DNA replication and mitosis were not highly controlled?
17. What is the final stage of the cell cycle? What is the function of this stage?
18. How does cytokinesis differ in plant and animal cells?
19. How is plant cell division different from animal cell division?
20. From one
cell, two
daughter cells are produced
that have the same number of
as the parent cell.
21. What is the importance of checkpoints in the cell cycle?
22. Why might a cell not divide?
23. Define cancer:
24. How is a cancer cell different from a normal cell?
Section 5.2 – Asexual Reproduction – pages 166 - 183
1. Define asexual reproduction:
2. MEIOSIS – on the next page
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name each different type of asexual reproduction
draw and describe what is happening in each type
state the different plant and animals that use each type.
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1: __________________________
2: _________________________
Description: ________________________ Description:________________________
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Type of species: ___________________
Type of species: ___________________
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3: __________________________
4: _________________________
Description: ________________________ Description:________________________
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Type of species: ___________________
Type of species: ___________________
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5: __________________________
Description: ________________________
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Type of species: ___________________
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3. Define clone:
4. How does binary fission in bacteria differ from binary fission in eukaryotic
cells?
5. How does budding in yeast differ from binary fission in amoebas?
6. What is plant grafting?
7. List the advantages and disadvantages of asexual reproduction in the table below.
Advantage
Disadvantage
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8. What is the purpose of human-assisted cloning?
9. Describe how Dolly the sheep was cloned by reproductive cloning.
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10. What is therapeutic cloning?
11. Define stem cells.
12. Define embryonic stem cells.
13. Why is it more desirable to use embryonic stem cells than adult stem cells?
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