Complex sentence: The adaptability of the system is achieved by localized somatic mutations and an irreversible recombination of antigen receptor gene segments.llows a small number of genes to generate a vast number of dich are then uniquely expressed on each indiviual lymphocyte.
Split into simpler sentences: The adaptability of the system is achieved by localized somatic mutations and an irreversible recombination of antigen receptor gene segments. This mechanism allows a small number of genes to generate a vast number of different antigen receptors, which are then uniquely expressed on each indiviual lymphocyte.