Second-degree relative

A second-degree relative (SDR) is someone who shares 25% of a person's genes. It includes uncles, aunts, nephews, nieces, grandparents, grandchildren, half-siblings, and double cousins.[1][2][3]

See also

References

"Breast and Ovarian Cancer and Family History Risk Categories". Center for Disease Control.
"First, Second and Third Degree Relative". Blue Cross Blue Shield.
"NCI Dictionary of Genetics Terms". Cancer.gov.

First-degree relatives

Second-degree relatives

Third-degree relatives

Kinship terminology

Genealogy
and lineage

Family trees	Pedigree chart Genogram Ahnentafel Genealogical numbering systems Seize quartiers Quarters of nobility

Relationships

Holidays

Related

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