1. The Cell Cycle/Division/Mitosis
Unit 4

2. The Cell Cycle Interphase Mitosis Cytokinesis

3. Click here for definition
CDK
Click here for definition
Cyclin
(Synthesis)

4. M phase has 4 stages plus Cytokinesis!!
Cell Cycle Expanded
M phase has 4 stages plus Cytokinesis!!
Movie

5. Interphase Performs normal activities for life. G1-Grows
S-Replicates/synthesizes
the DNA(genetic material)
G2-Grows
DNA is in the chromatin state
(kind of like spaghetti)

6. What are the stages/phases of Mitosis?

7. Centrioles appear

8. Centrioles move

10. Spindle fibers
grow from
the centrioles
center of the cell

11. (DNA/Chromosomes)

12. Two new nuclei form
Cell membrane pinches in

13. This process ends the cell cycle.
Cytokinesis
This process ends the cell cycle.

14. Cytokinesis
new

15. CELLS AFTER COMPLETING THE CELL CYCLE

16. How is mitosis different in plant and animal cells?

17. During Telophase and Cytokinesis in
Plant cell--a cell wall forms between the two daughter cells
Animal cell --cell membrane pinching in for cytokinesis no cell wall forms

18. Interphase
Prophase
Metaphase
Animal Cell
Telophase
Anaphase

19. Plant Cells

20. Understanding Chromosomes The genetic material inside the nucleus goes by many different names. The name depends on how it is packaged or where it is located in the cell.

21. Understanding Chromosomes
Nucleus
Sister Chromatids
Protein

22. Tightly coiled DNA strand
Centromere

23. Chromosome number during the Cell Cycle2 4 4 4 2 2
Interphase
Cytokinesis

24. Asexual Reproduction
When one organism produces one or more new organisms that can live on their own.
Reproduction without sperm and egg uniting.

25. Binary fission
Parent cell splits in two, producing identical daughter cells.
Not mitosis because there is no nucleus but the DNA does get copied and transferred to the next generation.

26. Budding
Organisms produce buds “mini-me” that will grow into a genetically identical adult.
Bud
Yeast (unicellular)
Hydra (Multicellular)

27. Regeneration
New tissue growth at the site of a wound

28. Propagating Plants from Stem Cuttings (a type of Regeneration)

29. Why Choose Asexual Reproduction? --Advantages
Rapid population growth
No fertilization of an egg cell-no need of a partner.
Organism can remain in one particular place
Genetically identical copies of the parent-- adapted to the environment.
Each spot on this Petri dish is a bacterial colony started by one bacterium.
By the time a colony is visible to the human eye, it consists of at least one million cells.

30. Disadvantages of Asexual Reproduction?
Streptococcus bacteria.
No genetic difference, change is environment can be deadly to entire population.
Any mutations or "bad" qualities will be passed on.
Antibiotic change the environment for the
bacteria that cause
Strep-throat. In
most cases
all of the
bacteria
will die.
Strep Throat infection

32. CDK- a molecule that plays a key role in controlling the cell cycle.
Cyclin-regulates CDK

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Modified by R. O’Connor 10/10