1 / 53

The Cell Cycle

The Cell Cycle. DNA has a Double helix shape. This is a naked strand of DNA. DNA wraps itself around proteins. DNA + protein is called Chromatin. Visible, compact chromatin makes up a Chromosome. As chromatin condenses…. it becomes. visible under a light microscope.

sarah
Download Presentation

The Cell Cycle

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The Cell Cycle

  2. DNA has a Double helix shape This is a naked strand of DNA DNA wraps itself around proteins DNA + protein is called Chromatin Visible, compact chromatin makes up a Chromosome As chromatin condenses… it becomes visible under a light microscope.

  3. Naked DNA Chromatin Supercoils Chromosome This is another look at how DNA is packaged.

  4. The three C’s that might confuse you. Centrosome Centrioles Centromeres

  5. Interphase

  6. Centrosomes Nucleolus Nucleus The Cell in Interphase Cell membrane DNA “G1” stage Replicates (“S” stage) Cytoplasm Chromatin forms supercoils (“G2” stage)

  7. Mitotic Phase

  8. MITOSIS

  9. Nucleolus disappears Chromosomes become visible The Cell in Early Prophase Chromatin condenses

  10. The Cell in Late Prophase Nuclear envelope breaks down Centrosomes move apart Spindle fibers form

  11. METAPHASE Spindle fibers attach to centromeres Chromosomes align in middle of the cell

  12. METAPHASE Under the microscope, chromosomes may appear flat. In the cell however, chromosomes have a three-dimensional arrangement.

  13. Sister Chromatids separate and move apart ANAPHASE “Free” spindle fibers lengthen; cell elongates Spindle microtubules disintegrate behind chromatids

  14. TELOPHASE Daughter chromosomes reach centrosomes

  15. CYTOKINESIS TELOPHASE Mitotic spindle disappears Cell divides into two identical daughter cells Nuclear membrane reforms Nucleoli reappear

  16. New daughter cells INTERPHASE CYTOKINESIS

  17. Mitosis Animated Click through the next 30 slides to see a rough animation of the cell cycle.

  18. The Cell in Interphase 1

  19. Interphase 2

  20. Interphase 3

  21. Interphase 4

  22. Interphase 5

  23. Interphase 6

  24. Interphase 7

  25. Prophase 8

  26. Prophase 9

  27. Prophase 10

  28. Prophase 11

  29. Metaphase 12

  30. Metaphase 13

  31. Metaphase 14

  32. Anaphase 15

  33. Anaphase 16

  34. Anaphase 17

  35. Anaphase 18

  36. Telophase 19

  37. Telophase 20

  38. Telophase 21 Cytokinesis

  39. Telophase 22 Cytokinesis

  40. Telophase 23 Cytokinesis

  41. Telophase 24 Cytokinesis

  42. Telophase 25 Cytokinesis

  43. Daughter Cells 26

  44. Daughter Cells 27

  45. Daughter cells 28

  46. Interphase 29

  47. Interphase 30

  48. MITOTIC EVENTS PRACTICE IDENTIFY THE MITOTIC EVENTS IN THE SLIDES WHICH FOLLOW

  49. What mitotic event is shown? Answer: Anaphase

  50. What mitotic event is shown? Answer: Prophase

More Related