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Genetic variations accumulating within populations over generations give rise to biological evolution. Evolutionary changes can result in the formation of novel varieties and entire new species. These changes are responsible for the diverse forms of life inhabiting the planet. The evidence for evolution suggests that all living organisms descended from common ancestors.
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Evolutionary psychology explores the origins of human behavior and mental processes by framing them within the context of natural selection, a theory famously propounded by Charles Darwin. This field asserts that many behaviors common across human societies — ranging from instinctive fear reactions to complex social interactions — arose as evolutionary adaptations. These adaptations enhanced the survival and reproductive success of our ancestors, thereby becoming embedded in the...
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The genomes of eukaryotes are punctuated by long stretches of sequence which do not code for proteins or RNAs. Although some of these regions do contain crucial regulatory sequences, the vast majority of this DNA serves no known function. Typically, these regions of the genome are the ones in which the fastest change, in evolutionary terms, is observed, because there is typically little to no selection pressure acting on these regions to preserve their sequences.
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Updated: Dec 25, 2025

Daily Transfers, Archiving Populations, and Measuring Fitness in the Long-Term Evolution Experiment with Escherichia coli
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Exerting an influence on evolution.

Charles C Roseman1

  • 1Department of Evolution, Ecology, and Behavior, School of Integrative Biology, University of Illinois, Urbana-Champaign, Urbana, United States.

Elife
|March 27, 2020
PubMed
Summary
This summary is machine-generated.

Developmental processes significantly impact the creation of phenotypic variation, directly influencing evolutionary trajectories. These findings highlight the crucial role of development in shaping life

Keywords:
developmental biologydevelopmental constraintdevelopmental variabilityevo-devoevolutionary biologyline of least resistancemolarmouserodent

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Area of Science:

  • Evolutionary biology
  • Developmental biology
  • Genetics

Background:

  • Phenotypic variation is a key driver of evolution.
  • Understanding the sources of phenotypic variation is crucial for evolutionary studies.
  • Developmental processes are increasingly recognized for their role in shaping phenotypes.

Purpose of the Study:

  • To investigate the influence of developmental processes on phenotypic variation.
  • To determine how developmental mechanisms contribute to evolutionary change.

Main Methods:

  • Experiments were conducted on mice models.
  • Analysis focused on the generation of phenotypic variation during development.

Main Results:

  • Developmental processes were shown to influence the generation of phenotypic variation.
  • This influence was observed to shape evolutionary outcomes.

Conclusions:

  • Developmental processes play a significant role in generating the variation upon which natural selection acts.
  • The study underscores the importance of integrating developmental mechanisms into evolutionary theory.