# Homework Help: Genetics: Bacterial Genetics and Specialized Transduction

1. Jun 11, 2008

### luna02525

1. The problem statement, all variables and given/known data

Compare and contrast the transfer of the F factor and the lambda phage during conjugation under the following conditions:

a) Hfr($$\lambda$$) x F-
b) Hfr x F- ($$\lambda$$)
c) Hfr($$\lambda$$) x F-($$\lambda$$)

3. The attempt at a solution

a) Hfr infects F- which is non-immune --> lysis occurs

c) Hfr tries to infect F- with lambda already inserted: immune---> no lysis

The transfer where F- already has lambda inserted I'm not sure of what happens. The other two are textbook. My guess would be that Hfr infects F- and excises phage lambda out of the F- which would be non-immune but I don't think lysis would occur.

Any help or guidance would be appreciated.