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  2. Heritability of autism - Wikipedia

    en.wikipedia.org/wiki/Heritability_of_autism

    Autism has a strong genetic basis. Although the genetics of autism are complex, autism spectrum disorder (ASD) is explained more by multigene effects than by rare mutations with large effects. [1] [2] Autism may be influenced by genetics, with studies consistently demonstrating a higher prevalence among siblings and in families with a history ...

  3. Epigenetics of autism - Wikipedia

    en.wikipedia.org/wiki/Epigenetics_of_autism

    While MTHFR is a proposed genetic factor for ASD, there is limited clinical evidence from testing for MTHFR gene polymorphisms in the diagnostic setting. [40] The reason for these complications may be due to other modifiers of the folate metabolism pathway or other genes included in the pathway.

  4. 16p11.2 deletion syndrome - Wikipedia

    en.wikipedia.org/wiki/16p11.2_deletion_syndrome

    16p11.2 deletion syndrome is a rare genetic condition caused by microdeletion on the short arm of chromosome 16. Most affected individuals experience global developmental delay and intellectual disability, as well as childhood-onset obesity. [1] 16p11.2 deletion is estimated to account for approximately 1% of autism spectrum disorder cases. [3] [4]

  5. A new test for autism hopes to help doctors diagnose before ...

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  6. Autism - Wikipedia

    en.wikipedia.org/wiki/Autism

    Genetic disorders – about 10–15% of autism cases have an identifiable Mendelian (single-gene) condition, chromosome abnormality, or other genetic syndromes. [ 279 ] Several metabolic defects , such as phenylketonuria , are associated with autistic symptoms.

  7. Diagnosis of autism - Wikipedia

    en.wikipedia.org/wiki/Diagnosis_of_autism

    Process for screening and diagnosing ASD; M-CHAT is Modified Checklist for Autism in Toddlers; (+) is positive test result; (−) is negative test result. There are several factors that make autism spectrum disorder difficult to diagnose. First off, there are no standardized imaging, molecular or genetic tests that can be used to diagnose ASD. [4]

  8. Causes of autism - Wikipedia

    en.wikipedia.org/wiki/Causes_of_autism

    The conclusion of these recent studies of de novo mutation is that the spectrum of autism is breaking up into quanta of individual disorders defined by genetics. [38] One gene that has been linked to autism is SHANK2. [39] Mutations in this gene act in a dominant fashion. Mutations in this gene appear to cause hyperconnectivity between the neurons.

  9. Dup15q - Wikipedia

    en.wikipedia.org/wiki/Dup15q

    It is the most common genetic cause of autism, accounting for approximately 1-3% of cases. [2] Dup15q syndrome includes both interstitial duplications and isodicentric duplications (i.e., Idic15) of 15q11.2-13.1. Important genes likely involved in the etiology of Dup15q syndrome include UBE3A, GABRA5, GABRB3, and GABRG3.

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