Crick,Brenner,and Colleagues Conducted Experiments in 1961 Using Mutants in the RII

Essay

Crick,Brenner,and colleagues conducted experiments in 1961 using mutants in the rII locus of the T4 phage.They were able to show that certain mutations could be reversed if they first consisted of an insertion and then a deletion (or first a deletion and then an addition).Explain why-in Crick and colleagues' experiments-that the "revertant" phenotypes did not look exactly like the wild types.