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Related Concept Videos

Obesity01:24

Obesity

The Body Mass Index (BMI) is a numerical value derived from a person's weight and height, used to categorize individuals into weight ranges. It is calculated using the formula: weight in kilograms divided by height in meters squared. Obesity is a health condition characterized by excessive accumulation of adipose tissue that poses health risks, often diagnosed with a BMI ≥ 30. This excess fat storage occurs when surplus dietary calories are converted into triglycerides and stored in adipocytes...
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...
Type II Diabetes I: Introduction01:26

Type II Diabetes I: Introduction

Type 2 diabetes mellitus (T2DM) is a chronic metabolic disorder characterized by insulin resistance, in which target tissues such as the liver, muscle, and adipose tissue respond poorly to insulin. It is also associated with inadequate compensatory insulin secretion, where pancreatic β-cells fail to produce sufficient insulin. Together, these abnormalities lead to persistent hyperglycemia.EtiologyT2DM develops through a complex interaction of genetic predisposition and environmental or...
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...
Polygenic Traits01:18

Polygenic Traits

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...
Polygenic Traits01:18

Polygenic Traits

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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Related Experiment Video

Updated: Jul 13, 2026

Semi-Automated Isolation of the Stromal Vascular Fraction from Murine White Adipose Tissue Using a Tissue Dissociator
06:08

Semi-Automated Isolation of the Stromal Vascular Fraction from Murine White Adipose Tissue Using a Tissue Dissociator

Published on: May 19, 2023

Genetic contributors to obesity.

Ruth McPherson1

  • 1University of Ottawa Heart Institute, Ontario. rmcpherson@ottawaheart.ca

The Canadian Journal of Cardiology
|December 6, 2007
PubMed
Summary

Obesity is influenced by genetics and environment, with heritability ranging from 40% to 70%. Over 244 genes impact adiposity, affecting food intake, fat storage, exercise, and metabolism.

Area of Science:

  • Genetics and Molecular Biology
  • Obesity Research
  • Physiology

Background:

  • Body weight regulation involves complex interactions between genetic and environmental factors.
  • Obesity heritability is substantial, estimated between 40% and 70%.
  • Numerous genes significantly influence adiposity, as demonstrated in mouse models.

Purpose of the Study:

  • To categorize genes affecting adiposity.
  • To explore the genetic underpinnings of obesity.
  • To understand the role of gene variants in human obesity.

Main Methods:

  • Review of genetic studies identifying genes affecting adiposity in mice.
  • Categorization of identified genes based on their physiological roles.
  • Analysis of rare variants in major candidate genes in human obesity phenotypes.

More Related Videos

Segmentation and Measurement of Fat Volumes in Murine Obesity Models Using X-ray Computed Tomography
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Segmentation and Measurement of Fat Volumes in Murine Obesity Models Using X-ray Computed Tomography

Published on: April 4, 2012

Related Experiment Videos

Last Updated: Jul 13, 2026

Semi-Automated Isolation of the Stromal Vascular Fraction from Murine White Adipose Tissue Using a Tissue Dissociator
06:08

Semi-Automated Isolation of the Stromal Vascular Fraction from Murine White Adipose Tissue Using a Tissue Dissociator

Published on: May 19, 2023

Segmentation and Measurement of Fat Volumes in Murine Obesity Models Using X-ray Computed Tomography
13:09

Segmentation and Measurement of Fat Volumes in Murine Obesity Models Using X-ray Computed Tomography

Published on: April 4, 2012

Main Results:

  • Over 244 genes identified as significantly affecting adiposity.
  • Genes categorized into four functional groups: food intake regulation, adipocyte differentiation, exercise activity, and thermogenesis.
  • Rare variants in key genes explain 5% to 10% of obesity cases.

Conclusions:

  • Genetic factors play a critical role in obesity development.
  • Understanding gene functions provides insights into metabolic regulation.
  • Genetic variants contribute to a significant portion of individual obesity susceptibility.