Question: 2) In the laboratory, you are given 10 strains of E. coli with the following lac operon genotypes…

2) In the laboratory, you are given 10 strains of E.
coli with the following lac operon genotypes, where I=lacI
(the lac represser gene), P= Plac (the promoter), O=
lacO lac operatorand Z=Zlac (the
beta-galactosidase gene). For each strain, predict whether
beta-galacosidase will be produced (a) if lactose is absent in the
growth medium and (b) if lactose is present in the growth medium.
Glucose is absent from the medium in every case. (Note: In partial
diploid strains (6-10), one copy of the lac operon is in the host
chromosome and the other copy is in the extrachromosomal F
factor.)

A) I+P+O+Z+ 


B) I-P+O+Z+ 


C) I+P+OcZ+ 


D) I-P+OcZ+ 


E) I+P+OcZ- 


F) F’ I+P+OCZ- I+P+O+Z+ 


G) F’ I+P+O+Z- / I+P+OcZ+ 


H) F’ I+P+O+Z+ / I-P+O+Z- 


I) F’ I+P+OcZ- / I-P+O+Z+ 


J) F’ I-P+O+Z- / I-P+OCZ+