1. Chapter 10 section 2 MITOSIS

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

3. Why do animals shed their skin?

4. I. Reasons cells reproduce through Mitosis A. Growth B. Repair C. Replacement

5. II. Cell Cycle A. Def: The life of a cell B. Stages of the cycle 1. Interphase 2. Mitosis a. Prophase b. Metaphase

6. c. Anaphase d. Telophase 3. Cytokinesis

8. C.Stages 1. INTERPHASE a. Some cells are always in this stage ex. nerve cells b. Prepares for cell division ex. Copying DNA Label: nucleus, nuclear membrane, chromatin

9. 2. MITOSIS a. PROPHASE 1. nuclear membrane & nucleolus fade & DISAPPEAR 2. centrioles APPEAR; move to opp. ends of cell, release SPINDLE FIBERS

10. 3. Chromosomes FORM Label: chromosomes, spindle fibers, centrioles

11. b. METAPHASE 1. chromosomes LINE UP IN MIDDLE of cell 2. spindle fibers stretch & attach to CENTROMERES Label: chromosomes, centromeres, spindle fibers, centrioles

12. c. ANAPHASE 1. centromere splits in HALF 2. Chromosomes SEPARATE into CHROMATIDS; move to opposite ends of cell

13. 3. centrioles pull spindle fibers back in Label: chromatids, centromeres, spindle fibers, centrioles

14. d. TELOPHASE 1. centrioles & spindle fibers fade & DISAPPEAR 2. nuclear membrane REAPPEARS; forms around CHROMATIDS 3. cell stretches out

15. Label: Chromosomes, nuclear membrane.

16. 3. CYTOKINESIS SPLITTING of cytoplasm to make 2 new cells

17. III. Plants vs. Animals PLANT CELLSANIMAL CELLS 1. have NO centrioles 1. have centrioles

18. 2. CELL PLATE forms in cytokinesis to separate 2 new cells 2. CLEAVAGE FURROW forms in cytokinesis separate 2 new cells

19. Cell wall prevents the cells from pinching in, so a cell plate forms http://www.sirinet.net/~jgjohnso/reprod.htm l

20. Flexible cell membrane allows the cytoplasm to pinch in http://www.sirinet.net/~jgjohnso/reprod. html

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

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

23. REMEMBER! I Interphase P Prophase M Metaphase A Anaphase T Telophase C Cytokinesis IPMATC