1. Warm-Up
What are the 5 things characteristics of a living organism? What are the labelled parts of this cell that you see? What do they do? 1. 2. 3.

2. The importance of cell division
Photo Credit: © CAMR/A.B. Dowsett/Science Photo Library/Photo Researchers, Inc.

3. Cells Divide for 3 reasons
Repair injuries by replacing old cells to organism.
Growth of organism
Reproduce: Sexually or asexually

4. Cell Cycle Stages through which a cell passes as it grows and divides
There are 3 stages:
1. Interphase
2. Mitosis - PMAT
3. Cytokinesis

5. Stage 1: Interphase Longest stage
Cell grows in size and DNA chromosomes are copied (sister chromatids appear)

6. Stage 2: Mitosis
The 2 copies of DNA move apart and make 2 new nuclei in the cell.
Mitosis is broken into 4 phases: P.M.A.T.

7. Phase 1: PMAT Prophase Chromosomes thicken and become visible
Nucleus starts to dissolve
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8. Phase 2: PMAT Metaphase Chromosomes meet in middle of cell
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9. Phase 3: PMAT Anaphase Chromatids separate to opposite sides of cell
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Individual
chromosomes

10. Phase 4: PMAT Telophase Chromosomes stretch out and become invisible
Nucleus starts to form
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11. Stage 3: Cytokinesis
The cell membrane pinches to off to form 2 new cells.
2 identical cells are formed
46 chromosomes in humans

12. The cell plate gradually develops into a separating membrane.
Cytokinesis in Plants
In plants, a structure known as the cell plate forms midway between the divided nuclei.
Cell plate
Cell wall
The cell plate gradually develops into a separating membrane.
A cell wall then begins to appear in the cell plate.

13. Cell Cycle
Interphase
Mitosis - PMAT
Cytokinesis

14. Copyright Pearson Prentice Hall
10-2
The series of events that cells go through as they grow and divide is called
the cell cycle.
mitosis.
interphase.
cytokinesis.
Copyright Pearson Prentice Hall

15. Copyright Pearson Prentice Hall
10-2
The phase of mitosis during which the chromosomes line up across the center of the cell is
prophase.
metaphase.
anaphase.
telophase.
Copyright Pearson Prentice Hall

16. Copyright Pearson Prentice Hall
10-2
During mitosis, “sister” chromatids separate from one another during
telophase.
interphase.
anaphase.
metaphase.
Copyright Pearson Prentice Hall

17. To do now: Micro viewers
Complete micro viewer worksheet on the stages of mitosis.