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Related Concept Videos

What is Gene Expression?01:36

What is Gene Expression?

9.1K
A gene is a stretch of DNA that serves as the blueprint for functional RNAs and proteins. Since DNA is comprised  of nucleotides and proteins are comprised of amino acids, a mediator is required to convert the information encoded in DNA into proteins. This mediator is the messenger RNA (mRNA). mRNA copies the blueprint from DNA by a process called transcription. In eukaryotes, transcription occurs in the nucleus by complementary base-pairing with the DNA template. The mRNA is then...
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Structure of a Gene01:30

Structure of a Gene

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A gene is the fundamental unit of heredity. Every individual has two copies of each gene, one inherited from each parent. Although most people contain the same genes, there is a small fraction that is slightly different amongst people. A gene with a small difference in its sequence of DNA bases forms different alleles, contributing to different phenotypes.
However, only 1% of the DNA is composed of genes that encode proteins; the rest, 99% is non-coding DNA. This non-coding DNA performs...
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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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Chromatin Position Affects Gene Expression02:35

Chromatin Position Affects Gene Expression

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Chromatin is the massive complex of DNA and proteins packaged inside the nucleus. The complexity of chromatin folding and how it is packaged inside the nucleus greatly influences  access to genetic information. Generally, the nucleus' periphery is considered transcriptionally repressive, while the cell's interior is considered a transcriptionally active area. 
Topologically Associated Domains (TADs)
The 3-dimensional positioning of chromatin in the nucleus influences the...
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Cell Specific Gene Expression01:58

Cell Specific Gene Expression

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Reporter Genes02:11

Reporter Genes

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Reporter genes are a type of protein-coding gene that are often tagged to a gene of interest. Once inside a target cell, reporter genes usually produce visually identifiable characteristics like fluorescence and luminescence when expressed along with the gene of interest. Thus, reporter genes “report” the presence or absence of genes of interest in an organism, determine the gene expression pattern, or track the physical location of a DNA segment or protein in the cell.
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Analyzing Gene Expression from Marine Microbial Communities using Environmental Transcriptomics
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Analyzing Gene Expression from Marine Microbial Communities using Environmental Transcriptomics

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Ecology of Gene Expression.

Sarah P Flanagan1, Samridhi Chaturvedi2, Clarisse Palma-Silva3

  • 1School of Biological Sciences, University of Canterbury, Christchurch, New Zealand.

Molecular Ecology
|July 17, 2025
PubMed
Summary

Gene expression is crucial in ecology and evolution. This Special Issue explores transcriptional variation, environmental responses, and its impact on fitness, highlighting new methods and diversity in molecular ecology research.

Keywords:
adaptationecological geneticsnatural selection and contemporary evolutionphenotypic plasticityspecies interactionstranscriptomics

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Area of Science:

  • Molecular Ecology
  • Evolutionary Biology
  • Genomics

Background:

  • The significance of gene expression in biological systems is well-established.
  • Recent research increasingly focuses on the ecological and evolutionary implications of gene expression.

Discussion:

  • This Special Issue features 43 papers on transcriptional variation in ecological processes and responses to environmental factors.
  • It examines gene expression as a key phenotype influencing traits such as fitness.
  • Rapid methodological advancements are enhancing the study of this molecular phenotype.

Key Insights:

  • The collection showcases diverse authorship, contributing to a richer understanding of molecular ecology.
  • It emphasizes the role of gene expression in adaptation and ecological interactions.
  • New techniques are revolutionizing the study of gene expression in natural populations.

Outlook:

  • Future research directions in the ecology of gene expression are proposed.
  • The issue aims to inspire progress in equity, diversity, and inclusion within ecology and evolutionary biology.
  • Continued exploration of gene expression will deepen insights into evolutionary mechanisms and ecological dynamics.