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Related Concept Videos

Gene-Environment Interactions01:20

Gene-Environment Interactions

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Gene expression is a dynamic process that is significantly influenced by environmental factors. This interaction underlies the complex nature of biological development and the phenotypic differences observed among individuals, even among those with identical genetic makeups. Factors such as radiation, temperature, behavior, nutrition, and stress play pivotal roles in determining how genes are expressed. The concept of the reaction range is central to understanding this interaction. It posits...
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Transcription01:10

Transcription

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Overview
Transcription is the process of synthesizing RNA from a DNA sequence by RNA polymerase. It is the first step in producing a protein from a gene sequence. Additionally, many other proteins and regulatory sequences are involved in the proper synthesis of messenger RNA (mRNA). Regulation of transcription is responsible for the differentiation of all the different types of cells and often for the proper cellular response to environmental signals.
Transcription Can Produce Different Kinds...
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Genetic Screens02:46

Genetic Screens

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Genetic screens are tools used to identify genes and mutations responsible for phenotypes of interest. Genetic screens help identify individuals or a group of people at risk of developing  genetic diseases and help them with early intervention, targeted therapy, and reproductive options.
Forward genetic screens
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Natural Selection and Adaptation01:15

Natural Selection and Adaptation

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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.
Beyond physical adaptations,...
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Background and Environment Affect Phenotype02:27

Background and Environment Affect Phenotype

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Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
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Behavioral Genetics and Its Designs01:23

Behavioral Genetics and Its Designs

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Behavior genetics explores how genetic inheritance influences human behavior. It focuses on how genes, passed from parents to offspring, contribute to the development of behavioral traits and tendencies. This branch of genetics seeks to understand the complex interplay between inherited genetic factors and environmental influences in shaping our behaviors.
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Related Experiment Video

Updated: Feb 20, 2026

A Method to Test the Effect of Environmental Cues on Mating Behavior in Drosophila melanogaster
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Detecting genetic responses to environmental change.

Ary A Hoffmann1, Yvonne Willi

  • 1Centre for Environmental Stress and Adaptation Research, Bio21 Institute, Department of Genetics, The University of Melbourne, Parkville 3010, Australia. ary@unimelb.edu.au

Nature Reviews. Genetics
|May 9, 2008
PubMed
Summary

Environmental changes rapidly alter species

Area of Science:

  • Population genetics and evolutionary biology.
  • Environmental genomics and conservation genetics.

Background:

  • Environmental changes can rapidly alter allele frequencies in populations, especially those with short generation times.
  • Detecting these shifts in neutral genetic markers can indicate population stress and decline.
  • Identifying adaptive responses requires isolating genes involved in specific environmental adaptations.

Purpose of the Study:

  • To link shifts in candidate gene loci and regulatory regions to evolutionary adaptation to environmental changes.
  • To recognize adaptive constraints through DNA decay in genes related to physiological traits.
  • To provide tools for researchers and conservation managers to understand evolutionary dynamics.

Main Methods:

  • Analysis of allele frequency shifts in neutral genetic markers during population declines.

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  • Identification and analysis of candidate genes and regulatory DNA regions associated with adaptive responses.
  • Examination of DNA decay patterns in candidate genes to infer adaptive constraints.

    • Main Results:

    • Shifts in allele frequencies at neutral markers can indicate population stress.
    • Specific gene loci and regulatory regions show evolutionary responses to environmental factors like pollution and global warming.
    • DNA decay in candidate genes reveals adaptive constraints, particularly in physiological traits.

    Conclusions:

    • Genetic marker analysis, combined with candidate gene studies, offers insights into evolutionary adaptation and constraints.
    • These approaches are valuable for understanding species' responses to environmental change.
    • The findings aid researchers and conservation managers in assessing evolutionary potential and limitations.