Name: how environment shapes gene expression
Uploaded: 2024-10-24T14:03:06.000Z
Duration: 1 min 20 s
Channel: JoVE

K12 Standards

Florida Department of Education

High School

Life Science

SC.912.L.14

SC.912.L.14.6

Gene-Environment Interactions

Gene expression is influenced by environmental factors such as radiation, temperature, behavior, nutrition, and stress.
The range of reaction suggests that genes set potential limits for physical traits, while environmental conditions shape the actual outcomes within those limits. For example, genetics might set a potential height range, such as 5&#39;5&#34; to 6&#39;1&#34;, for an individual. However, environmental factors like nutrition and healthcare determine the actual height achieved within this range.
The genetic-environmental correlation highlights the bidirectional influence between genes and the environment, where each influences and responds to the other. For example, a child with a genetic predisposition to read may show an early interest in books, prompting parents and teachers to provide more books and support.
In epigenetics, researchers explore how identical genotypes can lead to diverse phenotypes. Identical twins, for instance, have the same genes but can exhibit significant differences in behaviors and mental processes, like musical proficiency or reading habits, based on the environment and life experiences.

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 that while genetics establish the potential boundaries &#8212; such as a height range from 5&#39;5&#34; to 6&#39;1&#34; &#8212; environmental influences determine where within these boundaries an individual&#39;s traits will fall.
The reaction range theory effectively illustrates that genes set the limits within which environmental factors operate. For instance, if genetics determines a possible height range for an individual, environmental factors like nutrition, physical activity, and overall health during developmental years will influence where within that range the individual&#39;s actual height will fall. This theory highlights the environment&#39;s significant role in the expression of genetic potential.
This interplay is further elaborated through the genetic-environmental correlation, which underscores a bidirectional relationship. Genes can influence the environment&#39;s shaping of individual traits, and conversely, environmental conditions can affect gene expression. A classic example of this is seen in children with a genetic inclination towards reading, who are more likely to seek out books. This behavior can lead to enhanced environmental support, such as increased access to books and encouragement from parents and educators, which, in turn, promotes further skill development in reading.
In the field of epigenetics, the focus is on how identical genetic codes can result in vastly different outcomes. Epigenetics studies modifications that do not change the DNA sequence but still affect gene activity. Identical twins, for example, share the same DNA but can exhibit differences in gene expression profiles due to distinct environmental exposures and life experiences. These differences can lead to diverse health outcomes and physical traits between twins, highlighting the potent effect of environmental factors.
Another illustrative example involves musical abilities. A child with a genetic disposition for music raised in an environment rich with musical experiences is more likely to develop a higher proficiency than one without such opportunities. This scenario shows not only the potential of genetics but also the powerful role of nurturing in achieving and extending genetic possibilities.

Gene expression is influenced by environmental factors such as radiation, temperature, behavior, nutrition, and stress.
The range of reaction suggests ...

Education

JoVE Core

Introduction to Psychology

Unit 1

Biopsychology

KEY TERMS AND CONCEPTS

how environment shapes gene expression

Environmental factors can change how genes are expressed. Gene expression is a dynamic process, and traits can differ even in people with the same DNA. Radiation, temperature, behavior, nutrition, and stress all help shape the final outcome.

The reaction range helps explain this process. It means genes set a possible range for a trait, while the environment helps decide where a person falls within that range. For example, genetics may allow a height range from 5'5&quot; to 6'1&quot;, but nutrition, physical activity, and overall health during development can influence the final height.

Gene-environment correlation also plays a role. In this relationship, genes can influence the kind of environment a person seeks out, and the environment can then affect gene expression. A child with a genetic tendency toward reading may choose books more often, which can lead to more support, more access to books, and more encouragement from parents and teachers.

Epigenetics shows how the same DNA can lead to different results. It studies changes that do not alter the DNA sequence but still affect gene activity. Identical twins are a clear example because they share the same DNA, yet different environments and life experiences can lead to different gene expression patterns and different health or physical traits.

Musical ability also shows this interaction. A child with a genetic inclination for music may develop stronger skills when raised in an environment rich in musical experiences. This example shows that genetics can provide potential, but nurturing and experience can help shape how far that potential develops.

How Environment Shapes Gene Expression

introduction to biological bases of psychology

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Biopsychology connects biology and psychology by showing how the body influences behavior and mental processes. It focuses on the nervous system, neurotransmitters, hormones, genetics, and evolutionary ideas. Together, these areas help explain why people think, feel, and act the way they do. The nervous system is the main foundation of biopsychology. It has two parts: the central nervous system, or CNS, and the peripheral nervous system, or PNS. The CNS includes the brain and spinal cord and...

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Environmental factors can change how genes are expressed. Gene expression is a dynamic process, and traits can differ even in people with the same DNA. Radiation, temperature, behavior, nutrition, and stress all help shape the final outcome. The reaction range helps explain this process. It means genes set a possible range for a trait, while the environment helps decide where a person falls within that range. For example, genetics may allow a height range from 5'5" to 6'1", but nutrition,...

heritability

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key terms and concepts

Explore how nutrition, stress, behavior, and other environmental factors influence gene expression, reaction range, epigenetics, and trait development.

How Environment Shapes Gene Expression | JoVE K12

JoVE Core Introduction to Psychology offers an engaging learning experience on the fundamental principles of psychology through concise video lessons. Students will explore important topics such as cognitive processes, emotional regulation, and neural mechanisms, establishing a strong foundation in the study of the mind and human behavior. This series provides an accessible and captivating approach to grasp the essential concepts of the discipline.

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How Environment Shapes Gene Expression

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