Modification Modification(tii 3)is the changing of phenotype occurs only on the transcriptional and translational levels but not involve the change of the genotype that is, the genetic material or the nucleotides thus it's only a ornamental alterationModification(饰变) is the changing of phenotype occurs only on the transcriptional and translational levels but not involve the change of the genotype , that is , the genetic material or the nucleotides, thus it’s only a ornamental alteration. Modification