1. The Cell Theory All cells come from other cells
All living things are made up of at least one cell.
Cells are the basic unit of structure and function in all living things.

2. The Cell Cycle

3. Cell Cycle All living things have a life cycle.
Individual cells also have life cycles.
Cell cycle is a series of events that takes place from one cell division to the next.

4. Why is cell division important?
Many-celled organisms (like you) grow because cell division increases the total number of cells in an organism.
One-celled organisms (bacteria, amoeba) use cell division to reproduce themselves.

5. Animated Cycle

6. MITOSIS

7. Mitosis Definition:
The process of cell division that results in the production of two new daughter cells.
The daughter cells (containing the two new nuclei) are identical to one another and to the original parent cell.

8. Mitosis can be divided into stages
interphase
prophase
metaphase
anaphase
telophase
cytokinesis
mitosis

9. Interphase This is not an actual step of mitosis
Interphase This is not an actual step of mitosis! the cell prepares for division
Animal Cell
DNA replicated
Organelles replicated
Cell increases in size
Plant Cell
DNA replicated
Organelles replicated
Cell increases in size

10. Interphase Plant Cell Animal Cell
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11. Prophase the cell prepares for nuclear division
Animal Cell
Packages DNA into chromosomes
Plant cell
Packages DNA into chromosomes

12. Prophase Plant Cell Animal Cell
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13. Metaphase the cell prepares chromosomes for division
Animal Cell
Chromosomes line up at the middle of the cell
Spindle fibers attach centrioles to chromosomes at the centromere
Plant Cell
Chromosomes line up at the center of the cell
Spindle fibers attach centrioles to chromosomes at the centromere

14. Metaphase Plant Cell Animal Cell
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15. Anaphase the chromosomes divide
Animal Cell
Spindle fibers pull chromosomes apart
One-half of each chromosome (called a chromotid) moves to each end of the cell
Plant Cell
Spindle fibers pull chromosomes apart
One-half of each chromosome (called a chromotid) moves to each end of the cell

16. Anaphase Plant Cell Animal Cell
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17. Telophase new nuclear membranes form
Animal Cell
DNA spreads out, appears as chromatin (threads)
2 nuclei form with nuclear membrane
Cell membrane pinches in to begin forming the two new daughter cells
Plant Cell
DNA spreads out, appears as chromatin (threads)
2 nuclei form with nuclear membrane
New cell wall begins forming between the nuclei to begin forming the two new daughter cells

18. Telophase Plant Cell Animal Cell
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19. Cytokinesis the cytoplasm splits and the cell divides into two daughter cells
each daughter cell has its own nucleus
daughter cells have identical chromosomes in the nuclei

20. Mitosis Animation

21. Animal Mitosis -- Review
Interphase                                                             
Prophase                                                             
Metaphase                                                             
Anaphase                                                             
Telophase
                                                            

22. Plant Mitosis -- Review
Interphase                                                             
Prophase                                                             
Metaphase                                                             
Anaphase                                                             
Telophase
                                                            

23. Mitosis Animation