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Epigenetic-Genetic Coupling and Understanding the Molecular and Cellular Basis of Lamarckian Inheritance
Robyn A Lindley1,2, Reginald M Gorczynski3, Edward J Steele4
1Department Clinical Pathology, Victorian Comprehensive Cancer Centre (VCCC), University of Melbourne, Melbourne 3052, Australia.
International Journal of Molecular Sciences
|February 27, 2026
Summary
Epigenetic-genetic coupling may explain Lamarckian inheritance of acquired traits. This process involves RNA-templated DNA recombination, potentially leading to stable, transgenerational inheritance of adaptations in mammals.
Area of Science:
- Evolutionary biology
- Genetics
- Molecular biology
Background:
- Epigenetic inheritance offers "soft", reversible mechanisms for trait transmission.
- Evidence suggests stable, DNA-integrated "hard" Lamarckian inheritance may occur.
- Understanding these mechanisms is key to evolutionary processes.
Purpose of the Study:
- To review biological evidence for epigenetic-genetic coupling.
- To propose a mechanism for Lamarckian inheritance of acquired adaptations.
- To explore conditions favoring "hard" Lamarckian inheritance.
Main Methods:
- Review of existing biological evidence.
- Analysis of molecular and cellular mechanisms.
- Examination of population dynamics and environmental factors.
Main Results:
- Epigenetic-genetic coupling involves RNA-templated homologous recombination.
- "Hard" Lamarckian inheritance may require specific population dynamics and sustained stimuli.
- RNA-to-DNA genetic feedback mechanisms support targeted genomic integration.
Conclusions:
- Epigenetic-genetic coupling provides a framework for Lamarckian inheritance.
- Advanced sequencing technologies can provide definitive evidence for acquired inheritance.
- This research offers a roadmap for future experimental breeding programs.
Keywords:
DNA polymerase etaIGHV locus in humans and micedeaminase driven reverse transcription mutagenesis (DRT)epigenetic inheritancehard lamarckian inheritanceimmunoglobulin somatic hypermutationsingle molecular real time (SMRT) genomic sequencingsoma to germline feedbacktarget site reverse transcription (TSRT)More Related Videos
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