For questions 1520 choose the most likely outcome after infe

For questions 15-20, choose the most likely outcome after infection with a mutant lambda phage of the given genotype from the list given:

a. lytic possible, lysogenic possible

b. lytic possible, lysogenic impossible

c. lytic impossible, lysogenic possible

d. lytic impossible, lysogenic impossible

e. cannot be determined

15. O-

16. cIII-

17. PL defective

18. cro-

19. N-

20. cII-

Solution

O- mutant lytic possible, lysogenic impossible

cIII mutant is lytic possible, lysogeny impossible

cII mutant is lytic possible, lysogeny impossible

PL defective: lytic impossible , Not clear if lysogeny os possible or not

Cro mutant lytic possible, lysogeny possible

N- mutant lytic impossible, lysogenic possible