1. Chapter 18 Genetics of Viruses and Bacteria

2. Viruses: are much smaller than bacteria consist of a genome in a protective coat reproduce only within host cell use enzymes and ribosomes of host to make more viruses Chapter 18 Genetics of Viruses and Bacteria

3. Lytic cycle: Lysogenic cycle: Chapter 18 Genetics of Viruses and Bacteria

4. Lytic cycle: Virus destroys host DNA, makes new viruses, digests cell wall Lysogenic cycle: Virus inserts DNA into host genome (becoming a dormant prophage). Generations later, virus reactivates. Chapter 18 Genetics of Viruses and Bacteria

5. Lytic cycle: Chapter 18 Genetics of Viruses and Bacteria

6. Lytic cycle: Chapter 18 Genetics of Viruses and Bacteria

7. Lytic cycle: Chapter 18 Genetics of Viruses and Bacteria

8. Lytic cycle: Chapter 18 Genetics of Viruses and Bacteria

9. Lytic cycle: Chapter 18 Genetics of Viruses and Bacteria

10. Lytic cycle: Chapter 18 Genetics of Viruses and Bacteria

11. Lytic cycle: Chapter 18 Genetics of Viruses and Bacteria

12. Lytic cycle: Chapter 18 Genetics of Viruses and Bacteria

13. Lytic cycle: Chapter 18 Genetics of Viruses and Bacteria

14. Lytic cycle: Chapter 18 Genetics of Viruses and Bacteria

15. Lytic cycle: Chapter 18 Genetics of Viruses and Bacteria

16. Lysogenic cycle: Chapter 18 Genetics of Viruses and Bacteria

17. Lysogenic cycle: Chapter 18 Genetics of Viruses and Bacteria

18. Lysogenic cycle: Chapter 18 Genetics of Viruses and Bacteria

19. Lysogenic cycle: Chapter 18 Genetics of Viruses and Bacteria

20. Lysogenic cycle: prophage Chapter 18 Genetics of Viruses and Bacteria

21. Lysogenic cycle: Chapter 18 Genetics of Viruses and Bacteria

22. Lysogenic cycle: Chapter 18 Genetics of Viruses and Bacteria

23. Lysogenic cycle:

24. Chapter 18 Genetics of Viruses and Bacteria Lysogenic cycle:

25. Chapter 18 Genetics of Viruses and Bacteria Lysogenic cycle:

26. Chapter 18 Genetics of Viruses and Bacteria Lysogenic cycle:

27. Chapter 18 Genetics of Viruses and Bacteria Lysogenic cycle:

28. Chapter 18 Genetics of Viruses and Bacteria Lysogenic cycle:

29. Animal Viruses: are diverse in their means of infection often have an envelope acquired from cell membrane. Chapter 18 Genetics of Viruses and Bacteria

30. Retroviruses: made of RNA use reverse transcriptase to make DNA from RNA template DNA inserts into host genome as dormant provirus. Chapter 18 Genetics of Viruses and Bacteria

31. Emerging viruses: usually existing viruses that expand their host territory. Chapter 18 Genetics of Viruses and Bacteria

32. Viroids: naked RNA Prions: infectious proteins mad cow disease. Chapter 18 Genetics of Viruses and Bacteria

33. Plasmids: Small rings of DNA with accessory genes Bacteria

34. Plasmids: Small rings of DNA with accessory genes. chromosome plasmid Bacteria

35. Transformation: Bacteria

36. Transformation: Bacteria take up naked DNA Bacteria

37. Transformation: Bacteria take up naked DNA Bacteria

38. Transformation: Bacteria take up naked DNA Bacteria

39. Transduction: Bacteria

40. Transduction: Phages carry bacterial DNA Bacteria

41. Transduction: Phages carry bacterial DNA Bacteria

42. Transduction: Phages carry bacterial DNA Bacteria

43. Transduction: Phages carry bacterial DNA Bacteria

44. Transduction: Phages carry bacterial DNA Bacteria

45. Conjugation: Bacteria

46. Conjugation: Bacteria “mate” to share DNA Bacteria

47. Conjugation: Bacteria “mate” to share DNA Bacteria

48. Conjugation: Bacteria “mate” to share DNA Bacteria

49. Conjugation: Bacteria “mate” to share DNA Bacteria

50. Conjugation: Bacteria “mate” to share DNA Bacteria

51. Conjugation: Bacteria “mate” to share DNA Bacteria

52. Conjugation: Bacteria “mate” to share DNA Bacteria

53. The F-factor gives a bacteria the ability to conjugate Bacteria

54. The F-factor gives a bacteria the ability to conjugate. The F-plasmid carries the genes for sex pili. Bacteria

55. Hfr cells (high frequency or recombination cells) have the F plasmid incorporated into the chromosome Bacteria

56. Hfr cells (high frequency or recombination cells) have the F plasmid incorporated into the chromosome. The F-factor of an Hfr carries other genes along with it. Bacteria

57. R-plasmids carry antibiotic resistance. Bacteria

58. Transposons are “jumping genes” that can move about in the genome. Bacteria