Biology / Unit 7 Bio 1583 short lesson, about 20 seconds
Polygenic Disease Risk from Genome Analysis
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The idea
A polygenic disease's risk depends on multiple genes plus environment, so genome analysis yields an estimated risk pattern, not a determined outcome.
In practice
A genome analysis for a polygenic condition can flag which contributing variants a genome carries, without any single variant determining outcome.
Where people slip
Single-gene defects cause only a small fraction of common disease, so most risk screening cannot reduce to one gene.
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