A second-degree relative (SDR) is someone who shares 25% of a person's genes. It includes uncles, aunts, nephews, nieces, grandparents, grandchildren, and half-siblings.[1][2][3]
References[]
- ^ "Breast and Ovarian Cancer and Family History Risk Categories". Center for Disease Control. https://www.cdc.gov/genomics/resources/diseases/breast_ovarian_cancer/risk_categories.htm.
- ^ "First, Second and Third Degree Relative". Blue Cross Blue Shield. https://www.bcbst.com/mpmanual/First_and_Second_Degree_Relative.htm.
- ^ "NCI Dictionary of Genetics Terms". Cancer.gov. http://www.cancer.gov/publications/dictionaries/genetics-dictionary?cdrid=485395.
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