Fisher's fundamental theorem of natural selection is a result in population genetics, developed by the statistician and evolutionary biologist Ronald Fisher, concerning the relationship between a population's genetic variance in fitness and its rate of increase in fitness through natural selection. The proper way of applying Fisher's own abstract statement of the theorem to actual biological populations has been debated by later biologists, but the underlying mathematical result itself is an accepted theorem.
Facts
StatementThe rate of increase in fitness of any organism at any time is equal to its genetic variance in fitness at that time. 1 Classification
Statement Form Connections
Has Statement Form
Entity-backed identity for the statement-form enum value this theorem already carries, resolved to a mathematics concept by an explicit value-to-entity map (phase 3 bucket conversion, docs\design_entity_backed_browse_buckets_20260928.md). The statement-form fact itself stays on the theorem unchanged.
Entity-backed identity for the statement-form enum value this theorem already carries, resolved to a mathematics concept by an explicit value-to-entity map (phase 3 bucket conversion, docs\design_entity_backed_browse_buckets_20260928.md). The statement-form fact itself stays on the theorem unchanged.
Proved By
Source Fisher's fundamental theorem of natural selection - Wikipedia
Sources
1. Fisher's fundamental theorem of natural selection - Wikipedia
Introduction
The rate of increase in fitness of any organism at any time is equal to its genetic variance in fitness at that time.
History section
first formulated in Fisher's 1930 book The Genetical Theory of Natural Selection
Proved By: Ronald Fisher, Lead paragraph
Fisher's fundamental theorem of natural selection is an idea about genetic variance in population genetics developed by the statistician
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