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Understanding autism
Understanding autism

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Polygenic

A condition or trait that is due to the combined effects of multiple genes (as opposed to the influence of a single gene). This applies to all but a small minority of autism cases (for instance those where autism is associated with a single gene disorder called neurofibromatosis). In autism the role of multiple genes is further complicated because different gene combinations may be involved in different individuals. (See also genetic heterogeneity.)

» Glossary