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Related Concept Videos

Genetic Variation01:25

Genetic Variation

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Genetic variation is the diversity in DNA sequences found among individuals of the same species. This diversity is crucial for a species' survival because it helps organisms adapt to environmental changes. Genetic variation begins with fertilization, where an egg and sperm cell merge. Each of these cells carries 23 chromosomes, up to 46 in the fertilized egg. Chromosomes are long DNA strands that contain genes, the basic units of heredity.
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Genome comparison is one of the excellent ways to interpret the evolutionary relationships between organisms. The basic principle of genome comparison is that if two species share a common feature, it is likely encoded by the DNA sequence conserved between both species. The advent of genome sequencing technologies in the late 20th century enabled scientists to understand the concept of conservation of domains between species and helped them to deduce evolutionary relationships across diverse...
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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.
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A population is composed of members of the same species that simultaneously live and interact in the same area. When individuals in a population breed, they pass down their genes to their offspring. Many of these genes are polymorphic, meaning that they occur in multiple variants. Such variations of a gene are referred to as alleles. The collective set of all the alleles within a population is known as the gene pool.
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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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Genetic Mapping of Thermotolerance Differences Between Species of Saccharomyces Yeast via Genome-Wide Reciprocal Hemizygosity Analysis
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Similarities and Differences in Genetics.

Wangyue Liu1, Liping Yang1, Hang Zhou2

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|October 31, 2025
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Genetic factors influence both substance and non-substance addictions, like gambling and internet addiction. Understanding shared genetic mechanisms, particularly involving neurotransmitters, is key to improving addiction treatment.

Keywords:
DifferencesGeneticsNon-substance addictionSimilaritiesSubstance addiction

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Area of Science:

  • Neuroscience
  • Genetics
  • Psychiatry

Background:

  • Substance and non-substance addictions share overlapping symptoms and high comorbidity, suggesting common underlying mechanisms.
  • Genetic vulnerability plays a significant role, accounting for over 50% in substance addiction.
  • Monoamine neurotransmitter systems (dopamine, serotonin) and the opioid system are implicated in various addiction types.

Purpose of the Study:

  • To systematically review and compare the genetic mechanisms underlying substance and non-substance addictions.
  • To elucidate the biological similarities and differences between these addiction categories.
  • To enhance the understanding of addiction pathogenesis and facilitate clinical translation of genetic findings.

Main Methods:

  • Systematic literature review focusing on genetic studies of substance and non-substance addictions.
  • Comparative analysis of genetic findings across different addiction types.
  • Identification of shared and distinct genetic factors, particularly involving neurotransmitter systems.

Main Results:

  • Evidence suggests shared genetic underpinnings between substance and non-substance addictions.
  • Specific genes within the dopamine, serotonin, and opioid systems are frequently associated with both addiction types.
  • Genetic factors are crucial at multiple stages of addiction development and maintenance.

Conclusions:

  • Shared genetic pathways contribute to the pathogenesis of diverse addictions.
  • Further research into these common genetic mechanisms can lead to novel therapeutic targets.
  • Understanding genetic similarities is vital for improving clinical interventions for all forms of addiction.