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Related Concept Videos

Dihybrid Crosses01:18

Dihybrid Crosses

Overview
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...
X-linked Traits01:19

X-linked Traits

In most mammalian species, females have two X sex chromosomes and males have an X and Y. As a result, mutations on the X chromosome in females may be masked by the presence of a normal allele on the second X. In contrast, a mutation on the X chromosome in males more often causes observable biological defects, as there is no normal X to compensate. Trait variations arising from mutations on the X chromosome are called “X-linked”.

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QTL Mapping and CRISPR/Cas9 Editing to Identify a Drug Resistance Gene in Toxoplasma gondii
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Published on: June 22, 2017

Human QTL linkage mapping.

Laura Almasy1, John Blangero

  • 1Department of Genetics, Southwest Foundation for Biomedical Research, P.O. Box 760549, San Antonio, TX 78245-0549, USA. almasy@sfbrgenetics.org

Genetica
|August 1, 2008
PubMed
Summary
This summary is machine-generated.

Human quantitative trait locus (QTL) linkage mapping shows success for complex traits. Future studies combining expression data and SNP panels will enhance QTL discovery and association studies.

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Area of Science:

  • Human genetics
  • Statistical genetics
  • Genomics

Background:

  • Quantitative trait locus (QTL) linkage mapping, a classical statistical genetics method, has been applied genome-wide for the past 10-15 years.
  • Despite successes in identifying and validating QTLs, a perception exists that linkage approaches are ineffective for complex human traits, often due to limited sample sizes and suboptimal family structures.

Purpose of the Study:

  • To highlight the continued productivity and potential of human QTL linkage mapping.
  • To predict future advancements in QTL detection and application.

Main Methods:

  • Genome-wide screening using quantitative trait locus (QTL) linkage mapping.
  • Integration of RNA expression level traits and high-density genome-wide single nucleotide polymorphism (SNP) panels.

Main Results:

  • Successful replication of QTLs and identification of underlying genes and functional variants.
  • Evidence of regulatory QTLs with large effect sizes when combined with expression data.
  • Utilizing SNP panels to identify previously localized QTLs and informing genome-wide association studies (GWAS).

Conclusions:

  • Human QTL linkage studies remain a valuable tool for genetic research.
  • Future research will benefit from integrating expression quantitative trait loci (eQTLs) and high-density SNP data.
  • Linkage mapping results will increasingly inform and refine genome-wide association studies.