title: Polymorphisms maintained by sexual selection in monogamous species of birds.
mesh_terms: D000483:Alleles; D000818:Animals; D001717:Birds; D005241:Feathers; D005260:Female; D005787:Gene Frequency; D008297:Male; D008954:Models, Biological; D010641:Phenotype; D010858:Pigmentation; D011110:Polymorphism, Genetic; D012641:Selection, Genetic; D012723:Sex; D012726:Sexual Behavior, Animal