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At this point, no one can say for certain that autism is even a genetic trait, as the causes are not fully known or understood.

There are certainly some genetic factors that seem to play into whether someone will develop autism, but it isn't as simple as dominant/recessive genes. Environmental factors, diet, vaccines, and other variables have also been suspected as autism causes or triggers.

If it were strictly a genetic disorder, it would be a recessive trait. If it were dominant, the number of people with autism would be much greater. The logic behind that is probably beyond the scope of this question.

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15y ago

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