What type of mutation(s) would cause genes regulated by a two-component regulatory system to be expressed constitutively? Briefly describe the mechanism by which rhoindependent termination occurs....

What type of mutation(s) would cause genes regulated by a two-component regulatory system to be expressed constitutively?

Briefly describe the mechanism by which rhoindependent termination occurs. Compare the autoinducers of gram-negative and gram-positive bacteria.