Genetics
Dyslexia is believed to be a genetic condition which means it is hereditary (runs in families). A child with one parent affected by this condition is 40-60% likely to also develop it.
Further evidence that dyslexia is a genetic condition comes from twin studies which indicate that if one child from a pair of identical twins is born with the condition, it is highly expected that the other will also develop it.
A range of genes possibly contributing to dyslexia have been identified but the precise mechanism of their effect, especially on the development of the brain is still unresolved. It is speculated that genes that make individuals vulnerable to immune factors during development of the brain and those that lead to deficiency of essential omega-3 fatty acids may play a role in developing Dyslexia.
An example of one located Dyslexia susceptability gene on chromosome 15.
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