The presence of a gene in four members of a Finnish family with dyslexia has given the first clear clue to its involvement in the disease.



Between 5% and 15% of people have dyslexia and associated problems reading, writing and spelling.



Although scientists suspected that genes were involved, they had not come up with convincing candidates — until now.




Juha Kere of the University of Helsinki in Finland and his team found that one gene is mutated in around 10% of Finnish dyslexics, compared with 2% to 3% in the rest of the population.

The presence of the gene does not necessarily mean dyslexia, but it increases susceptibility.

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