1. The Cell Cycle

2. THE CELL CYCLE

3. The Cell Cycle Cell Reproduction –One cell (parent cell) reproduces to make 2 identical cells (daughter cells)

4. There are three main divisions of the cell cycle INTERPHASE –G1, S, G2 MITOSIS –PMAT Cytokinesis

5. INTERPHASE Cells spend most of their time in this phase

6. Do Drawings now

7. Interphase Overall Cell grows in size and metabolizes Chromosomes duplicated

8. Interphase has three divisions 1 st phase= G 1 Cell grows in size and lives its life

9. “S” of Interphase (synthesis phase) DNA duplicates itself (DNA Replication)Chromatin duplicates – long coily strands of DNA that become wrapped up

10. G 2 = Rapid Growth before dividing Organelles are doubled to have enough for two cells

11. Interphase

12. MITOSIS - Nuclear division (how we make 2 nuclei from 1)

13. Mitosis Prophase –A.) Chromatin organizes itself into condensed chromosomes made up of 2 sister chromatids attached by a centromere Sister Chromatids – A chromosome and its duplicated twin Centromere – rubber band structure that joins the 2 sister chromatids together

14. Prophase –B.) Nuclear membrane breaks down –Nucleus dissolves –C.) Centrioles move to opposite ends of the cell (poles) –Centrioles – cylinder structures that will reel in the chromatids –D.) Spindle fibers form –Spindle fibers – football shaped set of ropes that will attach to the centrioles and the chromatids –Made of microtubules

15. Prophase

16. Mitosis Metaphase –Spindle fibers attach to centrioles and sister chromatids at their centromeres. –Chromosomes line up in the middle of the cell Line up on the metaphase plate/equator.

17. Metaphase

19. Mitosis Anaphase –The centromeres split apart and the sister chromatids separate from each other –The spindle fibers pull the chromatids toward the poles

20. Anaphase

22. Mitosis Telophase –Chromatids reach the poles –Chromosomes unwind –Spindle fibers break down –Nucleus reforms –Cell begins to split Cleavage furrow

23. Telophase

25. After Mitosis… Cytokinesis –Cells Separate

26. Onion Cell Root Tip Lab

27. Interphase

29. Prophase

32. Metaphase

37. Anaphase

42. Telophase and Cytokinesis

55. The Cell Cycle

56. What phase is this cell in? 1.Interphase 2.Prophase 3.Metaphase 4.Anaphase 5.Telophase

57. What phase is this cell in? 1.Interphase 2.Prophase 3.Metaphase 4.Anaphase 5.Telophase

58. What phase is this cell in? 1.Interphase 2.Prophase 3.Metaphase 4.Anaphase 5.Telophase

59. What phase is this cell in? 1.Interphase 2.Prophase 3.Metaphase 4.Anaphase 5.Telophase

60. What phase is this cell in? 1.Interphase 2.Prophase 3.Metaphase 4.Anaphase 5.Telophase

61. Which phase does a cell spend most of its time in? 1.Interphase 2.Prophase 3.Metaphase 4.Anaphase 5.Telosphase 6.Cytokinesis

62. What phase is this cell in? 1.Interphase 2.Prophase 3.Metaphase 4.Anaphase 5.Telophase

63. What phase is this cell in? 1.Interphase 2.Prophase 3.Metaphase 4.Anaphase 5.Telophase

64. What phase is this cell in? 1.Interphase 2.Prophase 3.Metaphase 4.Anaphase 5.Telophase

65. What phase is this cell in? 1.Interphase 2.Prophase 3.Metaphase 4.Anaphase 5.Telophase

66. What phase is this cell in? 1.Interphase 2.Prophase 3.Metaphase 4.Anaphase 5.Telophase

67. When do 2 daughter cells split 1.Interphase 2.Prophase 3.Metaphase 4.Anaphase 5.Telophase 6.Cytokinesis

68. Which of the following illustrations depicts a cell in anaphase? 1. 2. 3. 4. 5.

69. Which of the following illustrations depicts a cell in metaphase? 1. 2. 3. 4. 5.

70. Put the following phases of mitosis in the correct order: A B C D