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Epigenetic inheritance and evolution: a historian's perspective.
1Institut d'Histoire et de Philsophie des Sciences et des Techniques (CNRS, Université Paris 1 Panthéon-Sorbonne), 13 rue du Four, 75006 Paris, France.
Epigenetics offers new perspectives on evolutionary theory, potentially reviving neglected mechanisms like the Baldwin effect and genetic assimilation. This historical analysis clarifies their roles and distinguishes them from Lamarckism.
Area of Science:
- Evolutionary biology
- Epigenetics
- History of science
Background:
- The article examines the historical context of epigenetics within evolutionary theory.
- It addresses the debate on whether epigenetic inheritance revives neo-Lamarckism.
Observation:
- Modern epigenetics differs from historical Lamarckism.
- Epigenetic inheritance may enhance the Baldwin effect and genetic assimilation.
Findings:
- The Baldwin effect's historical efficiency was linked to non-genetic inheritance.
- Opposition to non-genetic inheritance marginalized the Baldwin effect during the Modern Synthesis.
Implications:
- Modern epigenetics can strengthen the link between adaptability and adaptation.
- Distinguishing the Baldwin effect from genetic assimilation clarifies epigenetics' causal role in evolution.
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