1.  How Cells Divide

2. How do little elephants grow up to be BIG elephants?

4. Skin cancer - the abnormal growth of skin cells - most often develops on skin exposed to the sun. Cell that reproduce by asexual reproduction reproduce constantly.

5. Animated Mitosis Cycle http://www.cellsalive.com/mitosis.htm Interphase Prophase Metaphase Anaphase Telophase & Cytokinesis

6. Chromosomes are copied Chromosomes appear as threadlike coils ( chromatin ) at the start, but each chromosome and its copy( sister chromosome) change to sister chromatids at end of this phase CELL MEMBRANE Nucleus Cytoplasm

7. Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

8. Mitosis begins (cell begins to divide) Centrioles (or poles) appear and begin to move to opposite end of the cell. Spindle fibers form between the poles. Centrioles Sister chromatids Spindle fibers

9. Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm Spindle fibers Centrioles

10. Chromatids (or pairs of chromosomes) attach to the spindle fibers. Centrioles Spindle fibers

11. Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

12. Chromatids (or pairs of chromosomes) separate and begin to move to opposite ends of the cell. Centrioles Spindle fibers

13. Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

14. Two new nuclei form. Chromosomes appear as chromatin (threads rather than rods). Mitosis ends. Nuclei Chromatin

15. Animal Cell Plant Cell Photographs from: http://www.bioweb.uncc.edu/biol1110/Stages.htm

16. Cytokinesis is the process in which the cytoplasm of a eukaryotic cell is divided to form two new cells Cell membrane moves inward to create two daughter cells – each with its own nucleus with identical chromosomes.

17. Animal Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Cytokinesis

18. Plant Mitosis -- Review Interphase Prophase Metaphase Anaphase Telophase Cytokinesis

19. I I nterphase P P rophase M M etaphase A A naphase T T elophase C C ytokinesis IPMATC I Pray M ore At T he Church

20. 20

21. 21 - Cell Division 21

22. http://www.cellsalive.com/mitosis.htm

23. 1.How are chromosomes and chromatids related? 2.How many phases are in mitosis? 3.What happens to chromosomes during interphase (before mitosis?) 4.Why is it important for the nuclear membrane to disintegrate during mitosis? 5.If a cell undergoes division every 5 minutes, how many cells will there be after 1 hour?

24. 1.A duplicated chromosome is made up of 2 chromatids 2.There are 4 phases in mitosis 3.The chromosomes duplicate during interphase before mitosis 4.The nuclear membrane disintegrates during mitosis so the chromosomes are able to move to opposite ends of the cell 5.60 minutes divided by 5 minutes = 12. 2 cells to the 12 th power = 4,096 cells