Title: genetic adaptation Long Title: IUPAC Gold Book - genetic adaptation DOI: 10.1351/goldbook.14711 Status: current Definition Result of random genetic variation due to mutation and (or) to changes in allele frequencies, causing variation in the survival and reproductive success of individuals and hence of groups of organisms, with the consequence that those best adjusted to their environment flourish. Note This process underlies the concept of natural selection leading to Darwinian evolution. Related Term - natural selection: https://goldbook.iupac.org/terms/view/14871 Source - PAC, 2009, 81, 829. 'Glossary of terms used in ecotoxicology (IUPAC Recommendations 2009)' on page 890 (https://doi.org/10.1351/PAC-REC-08-07-09) Other Outputs - html: https://goldbook.iupac.org/terms/view/14711/html - json: https://goldbook.iupac.org/terms/view/14711/json - xml: https://goldbook.iupac.org/terms/view/14711/xml Citation: Citation: 'genetic adaptation' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.14711 License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. Accessed: 2026-06-28T17:14:34+00:00