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Review

Recent Advances in Handedness Genetics

School of Medicine, University of St Andrews, North Haugh, St Andrews KY16 9TF, UK
Academic Editor: David A. Becker
Symmetry 2021, 13(10), 1792; https://doi.org/10.3390/sym13101792
Received: 29 August 2021 / Revised: 20 September 2021 / Accepted: 23 September 2021 / Published: 26 September 2021
(This article belongs to the Special Issue Cognitive and Neurophysiological Models of Brain Asymmetry)
Around the world, about 10% people prefer using their left-hand. What leads to this fixed proportion across populations and what determines left versus right preference at an individual level is far from being established. Genetic studies are a tool to answer these questions. Analysis in twins and family show that about 25% of handedness variance is due to genetics. In spite of very large cohorts, only a small fraction of this genetic component can be pinpoint to specific genes. Some of the genetic associations identified so far provide evidence for shared biology contributing to both handedness and cerebral asymmetries. In addition, they demonstrate that handedness is a highly polygenic trait. Typically, handedness is measured as the preferred hand for writing. This is a very convenient measure, especially to reach large sample sizes, but quantitative measures might capture different handedness dimensions and be better suited for genetic analyses. This paper reviews the latest findings from molecular genetic studies as well as the implications of using different ways of assessing handedness. View Full-Text
Keywords: handedness; neurodevelopment; GWAS; heritability; quantitative trait; polygenic scores handedness; neurodevelopment; GWAS; heritability; quantitative trait; polygenic scores
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MDPI and ACS Style

Paracchini, S. Recent Advances in Handedness Genetics. Symmetry 2021, 13, 1792. https://doi.org/10.3390/sym13101792

AMA Style

Paracchini S. Recent Advances in Handedness Genetics. Symmetry. 2021; 13(10):1792. https://doi.org/10.3390/sym13101792

Chicago/Turabian Style

Paracchini, Silvia. 2021. "Recent Advances in Handedness Genetics" Symmetry 13, no. 10: 1792. https://doi.org/10.3390/sym13101792

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