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Is ADHD Genetic?
- Heritability
- ~74%
- Inheritance
- polygenic
- Key genes
- DRD4 DRD5 DAT1
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ADHD is highly heritable (~74%). Multiple genes in dopamine and noradrenaline pathways contribute to risk alongside environmental factors.
How Genetic Is ADHD?
ADHD involves complex interactions between multiple genes and environmental factors. Heritability estimates range up to 74%, though no single gene determines outcome on its own.
Key genes associated with ADHD: DRD4 DRD5 DAT1. Variants in these genes have been identified through genome-wide association studies (GWAS) and clinical research as influencing susceptibility or severity.
Source: MedlinePlus Genetics
Does Family History Matter for ADHD?
Family history can be informative for ADHD, but its predictive power is limited because many genes — each with small effects — combine with environmental influences. A family history of the condition may prompt earlier or more frequent screening.
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