title: The combinations of the sexes of mammalian sibs and littermates: and the possibility of adaptive control.
authors.forename: W H
authors.initials: WH
authors.lastname: James
mesh_terms: D000220:Adaptation, Biological; D000818:Animals; D005075:Biological Evolution; D005190:Family; D005260:Female; D006801:Humans; D008297:Male; D008322:Mammals / Q000235:genetics*; D012744:Sex Ratio