First Degree Relative

**Semantic type:** Human

**Definition:** Any relative who is one meiosis away from a particular individual in a family; a relative with whom one half of an individual's genes is shared (i.e., parent, sibling, offspring) (from Genetics Home Reference glossary)

**Synonyms:** - FDR - First Degree Relative, NOS - RELATIVE, FIRST DEGREE - first-degree relative