Inheritance of auxiliary spur in the domestic fowl.
D000367:Age Factors; D000740:Anemia / Q000235:genetics / Q000662:veterinary; D000818:Animals; D002645:Chickens / Q000033:anatomy & histology*; D003116:Color; D004906:Erythrocyte Count; D005241:Feathers; D005260:Female; D005823:Genetics; D006579:Heterozygote; D006614:Hindlimb / Q000033:anatomy & histology*; D008297:Male; D009154:Mutation; D010641:Phenotype; D011201:Poultry Diseases / Q000235:genetics