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Evolution of Complexity. Molecular Aspects of Preassembly
Fredric M Menger1, Syed A A Rizvi2
1Department of Chemistry, Emory University, Atlanta, GA 30322, USA.
Molecules (Basel, Switzerland)
|November 13, 2021
Summary
The preassembly model proposes that genetic material for complex traits existed before the traits emerged. Epigenetic factors facilitated gene transfer, explaining rapid evolution and super-complexity.
Area of Science:
- Evolutionary biology
- Genetics
Background:
- Neo-Darwinism struggles to explain the rapid emergence of complex traits.
- The fossil record often lacks precursors for significant evolutionary developments.
Purpose of the Study:
- To introduce the preassembly model as a supplement to neo-Darwinism.
- To provide a mechanism for the rapid evolution of complex traits.
Main Methods:
- The study presents a theoretical model, 'preassembly'.
- It posits genetic material accumulates in non-coding genes over time.
- Epigenetic factors are proposed to mediate gene transfer to coding genes.
Main Results:
- The preassembly model explains the sudden appearance of complex traits like echolocation and flowering plants.
- It accounts for rapid evolutionary changes observed in species like the housecat.
- It addresses the lack of precursors before major species expansions, such as the Cambrian explosion.
Conclusions:
- The preassembly model offers a novel perspective on evolutionary complexity.
- It supplements existing evolutionary theories by addressing current explanatory gaps.
- This model aids in understanding the evolution of traits that appear disproportionately complex for their time.
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