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Related Concept Videos

Aggression01:47

Aggression

Humans engage in aggression when they seek to cause harm or pain to another person. Aggression takes two forms depending on one’s motives: hostile or instrumental. Hostile aggression is motivated by feelings of anger with intent to cause pain; a fight in a bar with a stranger is an example of hostile aggression. In contrast, instrumental aggression is motivated by achieving a goal and does not necessarily involve intent to cause pain (Berkowitz, 1993); a contract killer who murders for hire...
Human Genetics01:28

Human Genetics

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...
Behavioral Genetics and Its Designs01:23

Behavioral Genetics and Its Designs

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.
The primary methodologies used in behavior genetics include family studies, twin studies, and adoption studies, each providing unique...
Causes of Social Behavior III: Biological and Environmental Influences01:28

Causes of Social Behavior III: Biological and Environmental Influences

Social behavior is a complex phenomenon that arises from the interaction between biological predispositions and environmental influences. This intricate interplay shapes how individuals think, feel, and act in various social contexts. Understanding these mechanisms requires insights from psychology, neuroscience, genetics, and evolutionary theory.Environmental Influences on Social BehaviorEnvironmental factors, including temperature, odors, and visual stimuli, play a crucial role in shaping...
Evolutionary Psychology01:20

Evolutionary Psychology

Evolutionary psychology explores the origins of human behavior and mental processes by framing them within the context of natural selection, a theory famously propounded by Charles Darwin. This field asserts that many behaviors common across human societies — ranging from instinctive fear reactions to complex social interactions — arose as evolutionary adaptations. These adaptations enhanced the survival and reproductive success of our ancestors, thereby becoming embedded in the human psyche...
Incomplete Dominance01:43

Incomplete Dominance

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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Related Experiment Video

Updated: Jun 22, 2026

The Resident-intruder Paradigm: A Standardized Test for Aggression, Violence and Social Stress
09:12

The Resident-intruder Paradigm: A Standardized Test for Aggression, Violence and Social Stress

Published on: July 4, 2013

Genetics of human aggressive behaviour.

Ian W Craig1, Kelly E Halton

  • 1SGDP Centre, Institute of Psychiatry, Denmark Hill, PO 82, London SE5 8AF, UK. ian.craig@iop.kcl.ac.uk

Human Genetics
|June 10, 2009
PubMed
Summary
This summary is machine-generated.

Aggression has genetic and environmental roots. Understanding gene by environment interactions, especially involving serotonin pathways, is crucial for explaining individual differences in aggressive behavior.

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A New Approach that Eliminates Handling for Studying Aggression and the "Loser" Effect in Drosophila melanogaster

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Related Experiment Videos

Last Updated: Jun 22, 2026

The Resident-intruder Paradigm: A Standardized Test for Aggression, Violence and Social Stress
09:12

The Resident-intruder Paradigm: A Standardized Test for Aggression, Violence and Social Stress

Published on: July 4, 2013

Studying Aggression in Drosophila (fruit flies)
11:06

Studying Aggression in Drosophila (fruit flies)

Published on: February 25, 2007

A New Approach that Eliminates Handling for Studying Aggression and the "Loser" Effect in Drosophila melanogaster
07:19

A New Approach that Eliminates Handling for Studying Aggression and the "Loser" Effect in Drosophila melanogaster

Published on: December 30, 2015

Area of Science:

  • Behavioral genetics
  • Neuroscience
  • Evolutionary anthropology

Background:

  • Individual differences in aggression are influenced by genetic and environmental factors.
  • Genes involved in sexual differentiation, stress response, and serotonin pathways are potential targets for investigation.
  • Previous single-candidate gene studies have yielded limited evidence for major effect sizes.

Purpose of the Study:

  • To explore the genetic and environmental underpinnings of aggression.
  • To highlight the importance of gene-environment interactions in understanding aggressive behavior.
  • To provide insights into the links between genes, brain function, and aggression.

Main Methods:

  • Review of evolutionary, physiological, and anthropological aspects of aggression.
  • Analysis of genetic pathways controlling physiological and neuronal processes.
  • Examination of gene by environmental interactions, focusing on monoamine oxidase A.
  • Functional imaging studies of genetic variants in serotonin pathways.

Main Results:

  • Genes do not operate independently; genetic and environmental factors are crucial.
  • Studies on monoamine oxidase A emphasize the necessity of examining gene by environment interactions.
  • Functional imaging reveals insights into gene-serotonin pathway-brain-aggression links.

Conclusions:

  • Understanding aggression requires considering complex gene-environment interactions.
  • Future research should focus on multifactorial genetic and environmental influences.
  • Serotonin pathways and their genetic variants are key areas for further investigation into aggression.