title: Evolutionary biology: Oh sibling, who art thou?
authors: Andrew
authors: A
authors: Cockburn
mesh_terms: D000818:Animals; D005075:Biological Evolution; D001717:Birds / Q000145:classification / Q000235:genetics / Q000502:physiology*; D003299:Cooperative Behavior; D005220:Fathers; D005260:Female; D008297:Male; D008954:Models, Biological; D009035:Mothers; D010802:Phylogeny; D012098:Reproduction / Q000235:genetics / Q000502:physiology; D012726:Sexual Behavior, Animal / Q000502:physiology*; D035781:Siblings