shifting balance theory
E212228
Shifting balance theory is an evolutionary framework proposed by Sewall Wright that explains how genetic drift, selection, and gene flow interact across subdivided populations to drive adaptive evolution.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Sewall Wright effect | 1 |
| shifting balance theory canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T1908335 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: shifting balance theory Context triple: [Sewall Wright, notableConcept, shifting balance theory]
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A.
modern evolutionary synthesis
Modern evolutionary synthesis is the 20th-century unification of Darwin’s theory of natural selection with Mendelian genetics, forming the foundational framework of modern evolutionary biology.
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B.
The Causes of Evolution
The Causes of Evolution is a foundational 1932 book by geneticist J. B. S. Haldane that helped establish the modern synthesis by mathematically integrating Mendelian genetics with Darwinian natural selection.
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C.
Unified Neutral Theory of Biodiversity and Biogeography
Unified Neutral Theory of Biodiversity and Biogeography is an influential ecological theory proposing that biodiversity patterns and species abundances can be explained by assuming ecological equivalence among individuals regardless of species.
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D.
Hardy–Weinberg principle
The Hardy–Weinberg principle is a fundamental concept in population genetics that describes how allele and genotype frequencies remain constant from generation to generation in an idealized, non-evolving population.
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E.
Genetics of the Evolutionary Process
Genetics of the Evolutionary Process is a seminal work in evolutionary biology that synthesizes genetic principles with natural selection to explain how evolutionary change occurs within and between populations.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: shifting balance theory Target entity description: Shifting balance theory is an evolutionary framework proposed by Sewall Wright that explains how genetic drift, selection, and gene flow interact across subdivided populations to drive adaptive evolution.
-
A.
modern evolutionary synthesis
Modern evolutionary synthesis is the 20th-century unification of Darwin’s theory of natural selection with Mendelian genetics, forming the foundational framework of modern evolutionary biology.
-
B.
The Causes of Evolution
The Causes of Evolution is a foundational 1932 book by geneticist J. B. S. Haldane that helped establish the modern synthesis by mathematically integrating Mendelian genetics with Darwinian natural selection.
-
C.
Unified Neutral Theory of Biodiversity and Biogeography
Unified Neutral Theory of Biodiversity and Biogeography is an influential ecological theory proposing that biodiversity patterns and species abundances can be explained by assuming ecological equivalence among individuals regardless of species.
-
D.
Hardy–Weinberg principle
The Hardy–Weinberg principle is a fundamental concept in population genetics that describes how allele and genotype frequencies remain constant from generation to generation in an idealized, non-evolving population.
-
E.
Genetics of the Evolutionary Process
Genetics of the Evolutionary Process is a seminal work in evolutionary biology that synthesizes genetic principles with natural selection to explain how evolutionary change occurs within and between populations.
- F. None of above. chosen
Statements (46)
| Predicate | Object |
|---|---|
| instanceOf |
evolutionary theory
ⓘ
population genetics model ⓘ theoretical framework in evolutionary biology ⓘ |
| aimsToExplain | adaptive evolution ⓘ |
| appliesTo | subdivided populations ⓘ |
| assertsThat |
drift can move populations across fitness valleys
ⓘ
gene flow can spread favorable gene combinations among demes ⓘ selection can refine gene combinations within demes ⓘ |
| associatedWithDebate | Fisher–Wright controversy ⓘ |
| assumes |
demes differ in gene frequencies
ⓘ
multiple adaptive peaks exist ⓘ |
| contrastsWith | panmictic population models ⓘ |
| criticizedFor |
difficulty of empirical testing
ⓘ
reliance on strong population subdivision ⓘ |
| describesInteractionOf |
gene flow
ⓘ
genetic drift ⓘ natural selection ⓘ |
| emphasizesRoleOf |
demic subdivision
ⓘ
population structure ⓘ |
| field |
evolutionary biology
ⓘ
population genetics ⓘ |
| goal | to explain how complex adaptations can evolve ⓘ |
| hasComponent |
deterministic selection
ⓘ
limited migration among demes ⓘ stochastic processes ⓘ |
| historicalPeriod | early 20th century ⓘ |
| includesPhase |
Phase I
ⓘ
Phase II ⓘ Phase III ⓘ |
| influenced |
later models of metapopulation dynamics
ⓘ
theoretical work on rugged fitness landscapes ⓘ |
| PhaseIDescribes |
exploration of adaptive landscape by drift
ⓘ
genetic drift in small demes ⓘ |
| PhaseIIDescribes |
movement toward local adaptive peaks
ⓘ
within-deme selection ⓘ |
| PhaseIIIDescribes |
interdemic selection
ⓘ
spread of advantageous gene combinations via migration ⓘ |
| proposedBy | Sewall Wright ⓘ |
| proposedInContextOf | modern synthesis of evolutionary biology ⓘ |
| relatesToConcept |
genetic drift in small populations
ⓘ
interdemic selection ⓘ local adaptation ⓘ migration-selection balance ⓘ |
| usesConcept |
adaptive landscape
ⓘ
fitness peaks ⓘ fitness valleys ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: shifting balance theory Description of subject: Shifting balance theory is an evolutionary framework proposed by Sewall Wright that explains how genetic drift, selection, and gene flow interact across subdivided populations to drive adaptive evolution.
Referenced by (2)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Sewall Wright effect