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Britannica Sources used in this answer

Which relatives are considered consanguineous kin of the second degree?

Created from Britannica articles using AI. AI can make mistakes, so verify using Britannica articles.
(Left) Absence of inbreeding: horizontal lines connect mates, vertical lines connect parents with their child; (right) an inbreeding loop: horizontal bar at top of loop connects brother and sister, all other lines and bars as above
consanguinity (Left) Absence of inbreeding: horizontal lines connect mates, vertical lines connect parents with their child; (right) an inbreeding loop: horizontal bar at top of loop connects brother and sister, all other lines and bars as above

In the context of consanguinity, aunts and uncles are considered consanguineous kin of the second degree. They share approximately half the probability of common inheritance compared to the relationship between siblings, who are classified as consanguineous kin of the first degree.1