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Generating anatomical variation through mutations in networks - implications for evolution.

Jonathan Bard1

  • 1Department of Physiology, Anatomy & Genetics, University of Oxford, Oxford, UK.

Journal of Anatomy
|June 18, 2014
PubMed
Summary
This summary is machine-generated.

Genetic mutations indirectly cause anatomical variation by altering molecular networks. This systems-biology view explains rapid evolution of novel phenotypes and clarifies the molecular basis of genes.

Keywords:
anatomical variationevolutionmolecular networksmutationsystems biologyvariation

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Area of Science:

  • Developmental Biology
  • Evolutionary Genetics
  • Systems Biology

Background:

  • Anatomical variation arises from genetic mutations.
  • Proteins involved in embryonic development function in cooperative molecular networks.

Purpose of the Study:

  • To propose a systems-biology model for how genetic mutations lead to anatomical variation.
  • To explain the rapid evolution of novel phenotypes and clarify gene concepts in evolutionary genetics.

Main Methods:

  • Conceptual framework integrating control networks (CNs) and process networks (PNs).
  • Analysis of how mutations alter network outputs and subsequent tissue construction.

Main Results:

  • Anatomical variation results from a two-stage process: mutations altering CN outputs, which then modify PN-driven tissue construction.
  • Molecular networks amplify genetic variation, enabling broader phenotypic ranges and faster evolution of novel traits.
  • No genetic barrier exists for novel anatomical phenotypes derived from standard network variants.

Conclusions:

  • A systems-biology approach reinterprets genes as protein networks, where mutations alter network dynamics.
  • This model reconciles classical genetics with molecular mechanisms of anatomical variation and evolution.