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Updated: Oct 3, 2025

Resurrection of Dormant Daphnia magna: Protocol and Applications
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Whatever happened to reversion?

Charles H Pence1

  • 1Université catholique de Louvain, Institut supérieur de philosophie, Place du Cardinal Mercier 14, bte. L3.06.01, 1348, Louvain-la-Neuve, Belgium.

Studies in History and Philosophy of Science
|February 14, 2022
PubMed
Summary
This summary is machine-generated.

Reversion, once central to heredity and evolution theories in the late 19th and early 20th centuries, later became a historical curiosity. This shift reflects changing scientific perspectives on heredity and evolutionary mechanisms.

Keywords:
AtavismCharles DarwinFrancis GaltonKarl PearsonR.A. FisherReversionW.F.R. Weldon

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Area of Science:

  • Evolutionary Biology
  • History of Science
  • Genetics

Background:

  • The concept of reversion (or atavism) was considered a key phenomenon requiring explanation by early heredity theories.
  • Prominent scientists like Darwin, Galton, and Weismann viewed reversion as central to understanding inheritance patterns.

Observation:

  • By the mid-20th century, figures like Fisher dismissed reversion as a historical artifact or a conceptual obstacle.
  • The perceived importance of reversion dramatically declined within a few decades.

Findings:

  • This analysis explores the conceptual underpinnings of evolutionary theory that made reversion a significant problem for earlier scientists.
  • It examines the reasons for the subsequent decline in interest, marking the 'death' of reversion as a scientific problem.

Implications:

  • Understanding the historical trajectory of scientific problems like reversion offers insights into paradigm shifts in evolutionary and genetic theory.
  • The study highlights how conceptual frameworks influence the definition and relevance of scientific phenomena over time.