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Is Prader-Willi Syndrome Genetic?
- Heritability
- ~100%
- Inheritance
- other
- Key genes
- SNRPN,NDN
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Prader-Willi syndrome is caused by loss of function of genes on chromosome 15 that are normally only active on the paternal copy (genomic imprinting).
How Genetic Is Prader-Willi Syndrome?
Prader-Willi Syndrome has a strong genetic basis. Research estimates heritability at approximately 100%, meaning genetic factors account for the majority of variation in whether individuals develop this condition.
Key genes associated with Prader-Willi Syndrome: SNRPN,NDN. 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 Prader-Willi Syndrome?
Yes — family history is one of the strongest predictors of Prader-Willi Syndrome. If a first-degree relative (parent, sibling, or child) has been diagnosed, your own risk may be significantly elevated. Discussing your family history with a healthcare provider or genetic counsellor is strongly recommended.
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