What is Sister group?
A '''sister group''' or '''sister taxon''' is a term used to describe the closest relatives of an [[organism]] (or other [[taxon]]) in a [[phylogenetic tree]].<ref name=Fullerton>{{cite web|last=Eernisse|first=D.J.|title=Introduction to phylogeny: what is a sister taxon?|url=http://biology.fullerton.edu/biol404/phylo/sisters.html|work=Biology 404 - Evolution|publisher=Department of Biological Science, [[California State University]], Fullerton|accessdate=4 January 2012|archive-date=24 September 2018|archive-url=https://web.archive.org/web/20180924203836/http://biology.fullerton.edu/biol404/phylo/sisters.html|url-status=dead}}</ref> It is a term in [[cladistics]]. {{clade |label1= |1={{clade |1={{clade |1=A |2=B }} |2=C }} }} The sister group of organism A is B. The sister group of the [[clade]] B+A, is C. == References == {{reflist}} {{-}} {{biology-stub}} [[Category:Cladistics]]