1. Mitosis How a new cell is formed!

2. MONDAY 7/9/12…. MAIN IDEAS Why cells divide. What happens to a cell that gets too big. CHAPTER 10 CELL GROWTH AND DIVISION

3. Chapter 10 - ANSWER THE FOLLOWING QUESTION When a living thing grows, what happens to its cells? – HINT…Does the cell size increase as the living thing grows or does it make more cells? EXPLAIN!

4. Why do cells divide?  Growth  Repair  Development

5. Copyright Pearson Prentice Hall Cell Cycle ACTIVITY: DRAW AND LABEL THE CELL CYCLE

6. Cell Cycle Series of events a cell goes through as it grows & divides During the cycle a cell: –Grows –Prepares for division –Divides into 2 new daughter cells –Repeats cycle G1 S G2 M

7. Cell Cycle Interesting People Meet And Talk Constantly rophase etaphase naphase elophase nterphase ytokinesis

8. Cell Division Chromatin Tightly coiled DNA contains genetic information Holds sister chromatids together at the center Loosely coiled DNA wrapped around histones Two identical parts of a chromosome – “sister chromatids”

9. Cell Cycle Events Interphase - period between cell division Divided into 3 phases: –G 1 - cell grows –S - DNA is copied (replication) –G 2 - synthesis of organelles & prepares for mitosis G1 S G2 M

10. Copyright Pearson Prentice Hall Mitosis Biologists divide the events of mitosis into four phases: (PMAT) Prophase Metaphase Anaphase Telophase

11. Copyright Pearson Prentice Hall Mitosis ACTIVITY: MITOSIS FLIP BOOK

12. Cell Cycle Events Mitosis (M) phase –Prophase –Metaphase –Anaphase –Telophase Cytokinesis G1 S G2 M

13. Copyright Pearson Prentice Hall Section 10-2 Prophase Spindle forming Chromosomes (paired chromatids) Centromere Click to Continue Mitosis Prophase

14. Copyright Pearson Prentice Hall Mitosis Prophase  longest phase  centrioles separate and a spindle fibers begin to form.  chromatin condenses into chromosomes.  nuclear envelope breaks down. Spindle forming Centromere Chromosomes (paired chromatids)

15. Prophase in Plant Cell

16. Cell Cycle Events Mitosis (M) phase –Prophase –Metaphase –Anaphase –Telophase Cytokinesis G1 S G2 M

17. Centrioles Chromatin Interphase Nuclear envelope Cytokinesis Nuclear envelope reforming Telophase Anaphase Individual chromosomes Metaphase Centriole Spindle Centriole Chromosomes (paired chromatids) Prophase Centromere Spindle forming Section 10-2 Metaphase

18. chromosomes line up across the center of the cell. Metaphase plate chromosomes attach to spindle fibers. Centriole Spindle Chromosome

19. Metaphase in Plant Cell

20. Cell Cycle Events Mitosis (M) phase –Prophase –Metaphase –Anaphase –Telophase Cytokinesis G1 S G2 M

21. Copyright Pearson Prentice Hall Individual chromosomes Anaphase Mitosis Anaphase

22. Copyright Pearson Prentice Hall Anaphase sister chromatids separate into individual chromosomes (chromatids). chromosomes continue to move until they have separated into two groups. CHROMATIDS: Individual chromosomes

23. Anaphase in Plant Cell

24. Cell Cycle Events Mitosis (M) phase –Prophase –Metaphase –Anaphase –Telophase Cytokinesis G1 S G2 M

25. Copyright Pearson Prentice Hall Nuclear envelope reforming Telophase Mitosis Telophase

26. Copyright Pearson Prentice Hall Telophase Chromosomes gather at opposite ends of the cell and lose their distinct shape. new nuclear envelopes form around each cluster of chromosomes. Nuclear Envelope chromatids

27. Telophase in Plant Cell

28. Cell Cycle Events Mitosis (M) phase –Prophase –Metaphase –Anaphase –Telophase Cytokinesis G1 S G2 M

29. Copyright Pearson Prentice Hall Cytokinesis

30. Copyright Pearson Prentice Hall Cytokinesis cytoplasm pinches in half. Each daughter cell has an identical set of duplicate (same) chromosomes Daughter cells

32. Mitosis in Motion

33. Mitosis & Cytokinesis

34. a bc d e What is happening???

35. What does he mean? Dude, mitosis starts in five minutes…. I can’t believe you’re not ready yet.

36. Copyright Pearson Prentice Hall Cytokinesis in Plants In plants, a structure known as the cell plate forms midway between the divided nuclei. Cell wall Cell plate

37. Mitosis in Motion

38. Mitosis & Cytokinesis

39. a bc d e What is happening???

40. http://www.youtube.com/watch?v=N8gi1zC- SO8 http://www.youtube.com/watch?v=N8gi1zC- SO8

41. You can do this in pairs or by yourself!!! Haiku + pictures Song/rap – include all phases Acrostic poem + picture -include all phases Riddle cards – pic + all phases Cartoon – one per frame

42. Notebook Quiz 1.) If a cell starts out with 34 chromosomes, how many chromosomes will it have after mitosis? 2.) Why must a cell divide? 3.) What are 2 differences between a normal cell and a cancer cell? 4. 5. 6. 7. 8. 9.