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Third-degree relative

Third-degree relatives are a segment of the extended family and includes first cousins, great grandparents and great grandchildren.[1] Third-degree relatives are generally defined by the expected amount of genetic overlap that exists between two people, with the third-degree relatives of an individual sharing approximately 12.5% of their genes.[2] The category includes great-grandparents, great-grandchildren, grand-uncles, grand-aunts, first cousins,[3] half-uncles, half-aunts, half-nieces and half-nephews.

See also


  1. ^ "First, Second and Third Degree Relative". Blue Cross Blue Shield of Tennessee. Retrieved 18 August 2016.
  2. ^ Ludman, Mark (2009). The Encyclopedia of Genetic Disorders and Birth Defects. Infobase. p. 101. ISBN 9781438120959.
  3. ^ "29 CFR § 1635.3 - Definitions specific to GINA".

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Third-degree relative
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