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Gene-Environment Interactions

Gene-Environment Interactions

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...

Background and Environment Affect Phenotype

Background and Environment Affect Phenotype

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.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...

Mutations

Mutations

Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
Chromosomal Alterations Are Large-Scale Mutations
While point mutations are changes in a single nucleotide in...

Mutations

Mutations

Epigenetic Regulation

Epigenetic Regulation

Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...

Epigenetic Regulation

Epigenetic Regulation

Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.

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Related Experiment Video

Updated: Feb 22, 2026

Using Caenorhabditis elegans for Studying Trans- and Multi-Generational Effects of Toxicants

Using Caenorhabditis elegans for Studying Trans- and Multi-Generational Effects of Toxicants

Published on: July 29, 2019

Transgenerational Impact of Environmental Change.

Hannah L Morgan¹, Adam J Watkins²

¹Maternal and Fetal Health Research Centre, University of Manchester, Manchester, United Kingdom.

Advances in Experimental Medicine and Biology

|February 20, 2026

Summary

Environmental exposures can impact offspring health across generations. Parental and grandparental environmental factors influence offspring development and well-being, potentially through epigenetic changes.

Keywords:

Environmental change Epigenetics Fertility Phenotypes Reproduction

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Environmentally Induced Heritable Changes in Flax

Environmentally Induced Heritable Changes in Flax

Published on: January 26, 2011

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Last Updated: Feb 22, 2026

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Environmentally Induced Heritable Changes in Flax

Environmentally Induced Heritable Changes in Flax

Published on: January 26, 2011

Area of Science:

Environmental Science
Developmental Biology
Genetics

Background:

Species survival depends on adapting to environmental changes, which can occur too rapidly for genomic adaptation.
Environmental factors like diet, temperature, stress, and pollutants can negatively affect parental gametes, embryo development, and offspring health across generations.

Purpose of the Study:

To examine the transgenerational effects of maternal and paternal environmental factors on offspring development and well-being.
To investigate the role of epigenetic changes in transgenerational inheritance of environmental impacts.

Main Methods:

Review of animal models and human epidemiological data sets.
Analysis of studies focusing on parental and grandparental environmental exposures.
Examination of epigenetic modifications in gametes.

Main Results:

Environmental factors can adversely affect gamete quality, preimplantation embryo development, and multi-generational offspring health.
Epigenetic changes in parental or grandparental gametes are a potential mechanism for passing environmental influences across generations.

Conclusions:

Parental and grandparental environmental factors significantly impact offspring phenotype and well-being.
Epigenetic transgenerational inheritance is a key mechanism mediating these effects, highlighting the importance of environmental exposures for long-term health.