Understand why shared ancestry can raise the chance that both parents carry the same recessive variant.
The Relationship & Recessive Risk Explorer is an educational tool that explains the genetics of shared ancestry. It shows why biological relatives can be more likely than unrelated people to inherit the same rare recessive variant from a common ancestor.
It builds understanding of shared ancestry and recessive inheritance in neutral, educational terms. It does not judge marriage, and it is not an individualized genetic-risk calculator.
An educational explorer, not a risk calculator
Select a biological relationship above to see its Relationship Genetics Profile.
A rare recessive variant carried by a shared ancestor can travel down two family branches and reach both partners. If both carry the same recessive variant, their child may inherit two copies. Relationship category explains this general context; it cannot tell any couple whether they actually carry the same variant.
What this tool shows
The tool explains why biological relatedness can increase the chance of shared recessive variants, and what a relationship category means genetically.
What the results mean
The profile provides general shared-ancestry context and, where configured, bounded population-level evidence.
What the results do not mean
It does not calculate an individual couple's disease risk, does not infer anyone's genetic status, and is not a diagnosis.
Educational tools, not medical advice
