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Related Concept Videos

Heritability01:06

Heritability

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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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Human Genetics01:28

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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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When more than one gene is responsible for a given phenotype, the trait is considered polygenic. Human height is a polygenic trait. Studies have uncovered hundreds of loci that influence height, and there are believed to be many more. Due to the high number of genes involved, as well as environmental and nutritional factors, height varies significantly within a given population. The distribution of height forms a bell-shaped curve, with relatively few individuals in the population at the...
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Genome-wide Association Studies-GWAS01:11

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Genome-wide association studies or GWAS are used to identify whether common SNPs are associated with certain diseases. Suppose specific SNPs are more frequently observed in individuals with a particular disease than those without the disease. In that case, those SNPs are said to be associated with the disease. Chi-square analysis is performed to check the probability of the allele likely to be associated with the disease.
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Behavioral Genetics and Its Designs01:23

Behavioral Genetics and Its Designs

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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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Related Experiment Video

Updated: Sep 17, 2025

Screening for Functional Non-coding Genetic Variants Using Electrophoretic Mobility Shift Assay EMSA and DNA-affinity Precipitation Assay DAPA
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Transcripts with high distal heritability mediate genetic effects on complex metabolic traits.

Anna L Tyler1, J Matthew Mahoney1, Mark P Keller2

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Complex gene regulation, often far from the gene itself, significantly impacts traits like obesity. Our study identifies a key gene expression signature that explains metabolic variation and is conserved across species.

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Area of Science:

  • Genetics and Genomics
  • Systems Biology
  • Metabolic Disease Research

Background:

  • Phenotypic variability is influenced by gene regulation, with complex distal regulatory mechanisms gaining recent attention.
  • Understanding the role of distal gene regulation is crucial for deciphering complex traits and associated diseases.

Purpose of the Study:

  • To investigate the impact of distal gene regulation on complex traits, specifically diet-induced obesity and metabolic disease.
  • To develop and validate a method for identifying and interpreting gene expression signatures related to metabolic variation.

Main Methods:

  • Combined multi-tissue transcriptomes with physiological outcomes in Diversity Outbred mice.
  • Employed novel high-dimensional mediation analysis to identify a composite transcriptome signature.
  • Validated the signature in an independent mouse cohort and human studies.

Main Results:

  • Identified a heritable composite transcriptome signature explaining 30% of metabolic trait variation.
  • The signature is biologically interpretable and predicts obesity status across species.
  • Key transcripts in the signature exhibit complex, distal regulatory patterns across the genome.

Conclusions:

  • Trait-relevant variation in transcription is predominantly controlled by complex, distal regulatory elements.
  • This distal regulation, while complex, is identifiable, interpretable, and potentially translatable across species.
  • The findings highlight the importance of distal regulatory networks in shaping complex phenotypes and diseases.