Related Experiment Video
Updated: Jul 5, 2026

An Allele-specific Gene Expression Assay to Test the Functional Basis of Genetic Associations
Published on: November 3, 2010
Further evidence for a susceptibility locus contributing to reading disability on chromosome 15q15-q21
Johannes Schumacher1, Inke R König, Tatjana Schröder
1Institute of Human Genetics, University of Bonn, Bonn, Germany.
Background:
Linkage and association studies in dyslexia suggest that a susceptibility locus exists on chromosome 15q15-q21.
Objective:
This study aims to evaluate these findings in an independent sample of dyslexia.
Methods:
We performed linkage and association analyses using 82 families with dyslexia and 19 STR markers covering the target region on chromosome 15q.
Results:
We observed suggestive evidence for linkage at STR-marker D15S143; this was the strongest implicated marker in the previous linkage studies on dyslexia. At the association level, linkage disequilibrium (LD) was found between dyslexia and markers within a circumscribed genomic region recently implicated in two independent studies on dyslexia.
Conclusion:
Our data and the previous reported findings present convincing evidence for a dyslexia-related gene within the identified linkage and LD region on chromosome 15q. However, at this stage it seems difficult to determine whether the linkage and association findings point to more than one susceptibility loci within this region. A definite answer to this question will require systematic single nucleotide polymorphism-based LD mapping within the implicated region, which should lead to the identification of the true dyslexia susceptibility gene(s).
More Related Videos
09:16Array Comparative Genomic Hybridization (Array CGH) for Detection of Genomic Copy Number Variants
Published on: February 21, 2015
08:22A Novel Strategy Combining Array-CGH, Whole-exome Sequencing and In Utero Electroporation in Rodents to Identify Causative Genes for Brain Malformations
Published on: December 1, 2017
Related Concept Videos
Lethal Alleles
Lucien Cuénot discovered lethal alleles in 1905 while studying the inheritance of coat color in mice. The agouti gene is responsible for the color of the coat in mice. This gene codes for an agouti-signaling protein, which is responsible for melanin distribution in mammals. The wild-type allele gives rise to gray-brown coat color in mice, while the mutant allele gives rise to yellow coat color. In addition to coat color, the agouti gene is associated with the yellow...
Language and Cognition
Genomic Imprinting and Inheritance
The expression of some genes depends on which parent passed the gene to the offspring, through a phenomenon known as...
Learning Disabilities
Dyslexia
Dyslexia is a...
Genetic Lingo
Pleiotropy