Back mutations or reversions Point mutations are reversible Revertant wild type phenotype that was lost in the mutant is restored Same site revertants True revertants Second site mutation Suppressor mutation: restore the wild type phenotype by mutation somewhere elseBack Mutations or Reversions • Point Mutations are reversible • Revertant – wild type phenotype that was lost in the mutant is restored. • Same site revertants • True revertants • Second site mutation – Suppressor mutation: restore the wild type phenotype by mutation somewhere else