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Related Concept Videos

Overview of Transposition and Recombination02:13

Overview of Transposition and Recombination

Transposons make up a significant part of genomes of various organisms. Therefore, it is believed that transposition played a major evolutionary role in speciation by changing genome sizes and modifying gene expression patterns. For example, in bacteria, transposition can lead to conferring antibiotic resistance. Movement of transposable elements within the genetic pool of pathogenic bacteria can aid in transfer of antibiotic-resistant genetic elements. In eukaryotes, transposons can carry out...
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Genetic transfer occurs when genetic information is passed from one organism to another. It occurs via two mechanisms: vertical gene transfer and horizontal gene transfer. Vertical gene transfer occurs when genetic information is transferred from one generation to the next, which happens much more frequently than horizontal gene transfer. Both sexual and asexual reproduction are forms of vertical gene transfer, where one or more organisms pass some or all of their genome onto their progeny.
Types of Genetic Transfer Between Organisms02:18

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Transposons

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Determination of the Optimal Chromosomal Location(s) for a DNA Element in Escherichia coli Using a Novel Transposon-mediated Approach
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Goods-thinking vs. tree-thinking: Finding a place for mobile genetic elements.

James McInerney1, Carla Cummins, Leanne Haggerty

  • 1Bioinformatics and Molecular Evolution Unit; Department of Biology; National University of Ireland Maynooth, Co.; Kildare, Ireland.

Mobile Genetic Elements
|May 1, 2012
PubMed
Summary

The Tree of Life hypothesis has limitations. A new "goods-thinking" approach offers better evolutionary descriptions, integrating environment and genetic elements for a more comprehensive view of life's history.

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Area of Science:

  • Evolutionary biology
  • Genetics
  • Ecology

Background:

  • The "Tree of Life" hypothesis is a foundational concept in evolutionary biology.
  • Despite its utility, the Tree of Life has limitations in fully describing the complexity of evolution.
  • There's a persistent reliance on tree-thinking language even as the hypothesis evolves.

Purpose of the Study:

  • To advocate for a shift from traditional tree-thinking to a more inclusive "goods-thinking" perspective.
  • To demonstrate how goods-thinking can enhance evolutionary descriptions.
  • To highlight the benefits of integrating environmental factors and mobile genetic elements into evolutionary narratives.

Main Methods:

  • Conceptual analysis and commentary on existing evolutionary frameworks.
  • Comparison of tree-thinking and goods-thinking paradigms.
  • Exploration of how goods-thinking accommodates diverse evolutionary entities.

Main Results:

  • Goods-thinking provides a more accurate and integrated framework for understanding evolution.
  • This perspective facilitates closer integration of evolutionary processes with environmental contexts.
  • It offers a balanced view, giving equal importance to mobile genetic elements and chromosomal elements in evolutionary history.

Conclusions:

  • A transition to goods-thinking represents a significant improvement over traditional tree-thinking.
  • Goods-thinking offers a more robust and comprehensive model for evolutionary biology.
  • This approach better reflects the dynamic and interconnected nature of life's evolution.