genetic recombination

https://doi.org/10.1351/goldbook.11167
  1. Referring to new gene sequences, and thus to new heritable information, caused by gene crossovers, occurring naturally in either meiosis or mitosis, or constructed artificially for the purpose of introducing a new trait into an organism or cell line.
  2. In immunology, random scrambling of specific gene sequences to produce the vast array of possible immunoglobulin and T cell receptor sequences required to recognize, potentially, all possible antigens.
Source:
PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 799 (https://doi.org/10.1515/pac-2015-1202)