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Genetic Heterogeneity

Definition
AI-generated

Genetic heterogeneity means that the same phenotype or disease can arise from different genetic causes in different individuals or populations—distinct loci, alleles, or molecular mechanisms contributing to similar clinical or trait outcomes.

Topics
Core genetics
Related
Cross-Population Effect Heterogeneity Ancestry Genome-Wide Association Study (GWAS)

Why it matters in GWAS

It can dilute association signals in pooled analyses, motivate stratification by ancestry or subtype, and interact with pleiotropy when the same variants affect multiple related diagnoses.

Example usage

"We noted genetic heterogeneity across subtypes, so we performed separate GWAS within clinically defined strata."

Cross-Population Effect Heterogeneity Ancestry Genome-Wide Association Study (GWAS) GWAS Meta-Analysis Pleiotropy Trans-Ancestry GWAS
Related-term network

Click any node to open that term page.

Node order. The current term is first. Next come every page linked from Related terms, in the same top-to-bottom order as that list. Then new terms appear in two-hop layers: for each of those direct neighbors (in that same order), their related terms are appended if not already listed. A third pass does the same for two-hop nodes. The walk stops when a fixed maximum number of nodes is reached.

References

  • Jee J, et al. (2026). The pleiotropic landscape of the human genome. Nat Rev Genet. https://doi.org/10.1038/s41576-025-00908-0
  • Wainschtein P, et al. (2019). Recovery of trait heritability from whole genome sequence data. bioRxiv (discussion of architecture and heterogeneity).
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