First degree relative definitions

first-degree relative

The parents, brothers, sisters, or children of an individual. Also called FDR.
Found on http://www.cancer.gov/dictionary?expand=F

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first degree relative

A family member who shares about 50 percent of their genes with a particular individual in a family. First degree relatives include parents, offspring, and siblings.
Found on http://www.genesinlife.org/glossary

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First degree relative

A first degree relative is your parent, brother or sister, or your child. Half their genes are the same as yours. This only applies to blood relatives.
Found on https://www.encyclo.co.uk/local/20753

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first-degree relative

a relative that you share 1/2 of your genes with - such as your parents, children, and siblings.
Found on https://www.stanfordchildrens.org/en/topic/default?id=glossary-medical-gene

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