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Related Concept Videos

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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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: Apr 16, 2026

Navigating MARRVEL, a Web-Based Tool that Integrates Human Genomics and Model Organism Genetics Information
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RNA: a possible contributor to the 'missing heritability'.

Valérie Grandjean1, Danielle A Badro1, Jafar Kiani1

  • 1University of Nice, INSERM U636, Parc Valrose, Nice, 06100 France.

Basic and Clinical Andrology
|March 18, 2015
PubMed
Summary

Non-Mendelian inheritance, involving transgenerational epigenetic mechanisms, is observed in human diseases. Emerging evidence suggests non-coding RNA molecules may play a role in this non-genetic inheritance pattern.

Keywords:
ARN non-codantGamèteHéréditéÉpigénétique

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Area of Science:

  • Epigenetics
  • Molecular Biology
  • Genetics

Background:

  • Some human diseases defy traditional Mendelian inheritance patterns.
  • This atypical inheritance is linked to transgenerational epigenetic inheritance.
  • The precise molecular underpinnings of this phenomenon remain incompletely understood.

Purpose of the Study:

  • To explore the potential role of non-coding RNA in non-Mendelian inheritance.
  • To synthesize current evidence regarding epigenetic mechanisms in disease transmission.

Main Methods:

  • Review of recent studies in model organisms (Caenorhabditis elegans, Drosophila, mouse).
  • Analysis of emerging data on non-coding RNA function in inheritance.

Main Results:

  • Evidence from diverse species suggests non-coding RNAs are involved in transgenerational inheritance.
  • These findings provide a basis for further investigation into RNA-mediated epigenetic inheritance.

Conclusions:

  • Non-coding RNA molecules are increasingly implicated in non-Mendelian inheritance patterns.
  • While direct evidence in humans is pending, RNA-based epigenetic inheritance is a plausible mechanism for certain human pathologies.