A system for the correction of errors introduced during DNA replication when an incorrect base, which cannot form hydrogen bonds with the corresponding base in the parent strand, is incorporated into the daughter strand. The mismatch repair system promotes genomic fidelity by repairing base-base mismatches, insertion-deletion loops and heterologies generated during DNA replication and recombination [goid 6298] [evidence IEA]; The process by which immunoglobulin genes are formed through recombination of the germline genetic elements, as known as immunoglobulin gene segments, within a single locus [goid 16447] [evidence IEA]; In base excision repair, an altered base is removed by a DNA glycosylase enzyme, followed by excision of the resulting sugar phosphate. The small gap left in the DNA helix is filled in by the sequential action of DNA polymerase and DNA ligase [goid 6284] [pmid 8942985] [evidence IDA]; A system for the correction of errors introduced during DNA replication when an incorrect base, which cannot form hydrogen bonds with the corresponding base in the parent strand, is incorporated into the daughter strand. The mismatch repair system promotes genomic fidelity by repairing base-base mismatches, insertion-deletion loops and heterologies generated during DNA replication and recombination [goid 6298] [pmid 11005803] [evidence IDA]; A system for the correction of errors introduced during DNA replication when an incorrect base, which cannot form hydrogen bonds with the corresponding base in the parent strand, is incorporated into the daughter strand. The mismatch repair system promotes genomic fidelity by repairing base-base mismatches, insertion-deletion loops and heterologies generated during DNA replication and recombination [goid 6298] [pmid 8782829] [evidence IMP]; The process by which immunoglobulin genes are formed through recombination of the germline genetic elements, as known as immunoglobulin gene segments, within a single locus [goid 16447] [evidence IEA]; Any process involved in sustaining the fidelity and copy number of DNA repeat elements [goid 43570] [pmid 16388310] [evidence IMP]