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Related Concept Videos

Natural Selection and Mating Preferences01:06

Natural Selection and Mating Preferences

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The principle of natural selection posits that organisms better adapted to their environment are more likely to survive and reproduce. This principle is closely intertwined with mating preferences, a key aspect of sexual selection, which evolutionary psychologists believe is driven by instincts to propagate one's genes. Such instincts significantly influence mating behaviors and preferences between genders.
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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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Natural selection, a fundamental concept in evolutionary biology, is the mechanism by which evolution is driven, favoring organisms that are best adapted to their environments. This process enhances their chances of survival and reproduction. Adaptation, a key outcome of this process, involves genetic modifications that optimize an organism's functionality under specific environmental challenges, such as extreme cold or thinner air at high altitudes.
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Organisms that are well-adapted to their environment are more likely to survive and reproduce. However, natural selection does not lead to perfectly adapted organisms. Several factors constrain natural selection.
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Assessing Differences in Sperm Competitive Ability in Drosophila
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The Evolutionary Interplay between Adaptation and Self-Fertilization.

Matthew Hartfield1, Thomas Bataillon2, Sylvain Glémin3

  • 1Department of Ecology and Evolutionary Biology, University of Toronto, Toronto ON, Canada M5S 3B2; Bioinformatics Research Centre, Aarhus University, 8000C, Aarhus, Denmark.

Trends in Genetics : TIG
|May 13, 2017
PubMed
Summary
This summary is machine-generated.

Self-fertilizing organisms adapt differently than outcrossing ones. New research quantifies adaptation in self-fertilizers by considering standing variation and demographic history.

Keywords:
adaptationdemographydominancegenomicsinvasionsself-fertilization

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Area of Science:

  • Evolutionary Biology
  • Population Genetics

Background:

  • Genome-wide studies reveal adaptation in self-fertilizing organisms, often linked to environmental and reproductive changes.
  • Current models for adaptive mutation inference frequently assume outcrossing populations, potentially misrepresenting self-fertilizer data.

Purpose of the Study:

  • To review how self-fertilization influences the process of adaptation.
  • To propose methods for accurately quantifying adaptation in self-fertilizing species.

Main Methods:

  • Review of theoretical and empirical studies on adaptation in self-fertilizers.
  • Analysis of examples from current next-generation sequencing projects.

Main Results:

  • Self-fertilization significantly alters evolutionary adaptation dynamics compared to outcrossing.
  • Existing models may inaccurately characterize adaptive variants in self-fertilizing populations.

Conclusions:

  • Future research should incorporate self-fertilization's unique effects on adaptation.
  • Accurate quantification requires considering standing variation, demographic history, and polygenic adaptation.