somatic diversification theory

https://doi.org/10.1351/goldbook.13687
Theory that very few immunoglobulins (Ig) are inherited, but that extensive antibody diversity arises from mutations in non-reproductive cells.
Source:
PAC, 2012, 84, 1113. (IUPAC glossary of terms used in immunotoxicology (IUPAC Recommendations 2012)) on page 1246 [Terms] [Paper]