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Adam MP, Feldman J, Mirzaa GM, et al., editors. GeneReviews® [Internet]. Seattle (WA): University of Washington, Seattle; 1993-2024.

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GeneReviews® [Internet].

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Learn More (first-degree relative)

First-degree relatives of the person indicated by the arrow are parents, sibs, and children.

first-degree relative

Some Clinical Implications

  • An individual shares half of his/her genes with each parent and each child.
  • An individual shares an on average half of his/her genes with each sib.

Revised: 4-14-16

Related terms: pedigree; second-degree relative

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From: GeneReviews Glossary

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