Abstract: Developmental dyslexia is very common in school children and its etiology is very complicated. Many researches have been carried out to study the genetic and environmental influence on dyslexia. This paper reviews the behavior genetic researches on dyslexia, especially the important results and weaknesses of molecular genetic studies. The difficulties faced and the direction in the future are suggested and the relationship between behavior genetic studies and education is summarized and evaluated.

Key words: developmental dyslexia, behavior genetics, molecular genetics