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The genetics of dyslexia.

Dyslexia is a common, specific developmental disorder in which considerable progress has been made in the last 10 years in defining both the genetics and the behavioral phenotype. Conceptually, genetic analyses proceed in a series of linked steps considering in turn the questions of familiality, heritability, mode of transmission, and gene locations. The first part of the review will be organized accordingly. Then I will consider the issues of heterogeneity and behavioral phenotype