IN THE largest genetic study of dyslexia to date, scientists have identified 42 genetic variants that may influence a person's chance of having it. Dyslexia, which affects up to 1 in 10 people in the UK to some extent, often affects a person's ability to read, write and spell. Although the cause is unknown, previous research suggests that dyslexia is inherited, with smaller studies linking it to a few genes. To get a wider view of dyslexia's potential genetic associations, Michelle Luciano at the University of Edinburgh, UK, and her colleagues carried out a genome-wide association study on 1.1 million adults, mainly of European origin, of whom 51,000 said they had been diagnosed with dyslexia.
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