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Related Concept Videos

Human Genetics01:28

Human Genetics

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Human genetics provides a profound framework for understanding the interplay between genetic predispositions and human psychology. At the heart of this discipline lies the study of how genes influence physical traits, behaviors, and susceptibility to diseases. Each person carries a unique genetic code that subtly or significantly shapes their psychological and behavioral landscape.
The complex relationship between genetics and psychology is observable through common biological components such...
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Behavioral Genetics and Its Designs01:23

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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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Heritability01:06

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Heritability is a statistical concept that measures the degree to which genetic differences among individuals contribute to trait variations within a population. It is a fundamental idea in genetics, often prone to misinterpretation. Heritability is expressed as a percentage, reflecting the proportion of variation in a specific trait across a population that can be linked to genetic differences. However, it's important to understand that heritability does not determine how "genetic"...
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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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Incomplete Dominance01:43

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Gregor Mendel's work (1822 - 1884) was primarily focused on pea plants. Through his initial experiments, he determined that every gene in a diploid cell has two variants called alleles inherited from each parent. He suggested that amongst these two alleles, one allele is dominant in character and the other recessive. The combination of alleles determines the phenotype of a gene in an organism.
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Diploid organisms inherit genetic material through chromosomes from both parents. Copies of the same gene are known as alleles. In most cases, both alleles are simultaneously expressed and allow various cellular processes to function optimally. If one of the alleles is missing or mutated, the expression of the other allele can compensate; however, this is not true for all genes.
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Using Cholesky Decomposition to Explore Individual Differences in Longitudinal Relations between Reading Skills
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Executive Function and Impulsivity Predict Distinct Genetic Variance in Internalizing Problems, Externalizing

Daniel E Gustavson1, Claire L Morrison1,2, Travis T Mallard3,4

  • 1Institute for Behavioral Genetics, University of Colorado Boulder, Boulder, CO.

Clinical Psychological Science : a Journal of the Association for Psychological Science
|September 26, 2024
PubMed
Summary

Genetic factors influencing executive function and impulsivity are distinct, impacting mental health and life outcomes independently. These self-control traits show separate genetic links to various health conditions and cognitive abilities.

Keywords:
Barratt Impulsiveness ScaleUPPS-P Impulsive Behavior Scaleexecutive controlgenomic SEM

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Area of Science:

  • Behavioral Genetics
  • Psychiatric Genetics
  • Quantitative Genetics

Background:

  • Individual differences in self-control significantly predict health and life outcomes.
  • Previous twin studies suggest genetic underpinnings for self-control traits.
  • Executive function and impulsivity are key components of self-control.

Purpose of the Study:

  • To investigate the genetic overlap and independence of executive function and impulsivity.
  • To determine if genetic influences on these traits predict independent variance in mental health and other outcomes.
  • To utilize genomic structural equation modeling for hypothesis testing.

Main Methods:

  • Genomic structural equation modeling was employed.
  • The study analyzed genetic correlations between executive function and impulsivity factors.
  • Independent contributions of genetic influences to various outcomes were assessed.

Main Results:

  • Executive function and impulsivity showed only a modest genetic correlation (r=0.13).
  • Low executive function, independent of impulsivity, was genetically linked to internalizing, externalizing, thought, and compulsive disorders, and chronotype.
  • Impulsivity, independent of executive function, was genetically linked to internalizing and externalizing disorders, body mass index, and insomnia, and inversely to compulsive disorders.

Conclusions:

  • Executive function and impulsivity represent genetically separable constructs.
  • These distinct genetic factors have independent associations with a range of mental health and behavioral outcomes.
  • Understanding these genetic separations offers insights into targeted interventions for self-control deficits.