title: Development of parthenogenetic membranes in double-yolked and injected chicken eggs.
abstract: Development of parthenogenetic eggs is expressed in a Dark Cornish stock by either membrane or embryo formation. Double-yolked eggs have membranes developing in zero, one, or two yolks. The incidence of double-yolked eggs with two membranes was higher than expected when compared with the incidence of single-yolked eggs from the same hens. Membrane formation was increased over that of the controls by injecting saline, Ringer's solution, or ground crude membranes. Yolk and membranes filtered through a 3 mu filter or autoclaved did not increase membrane formation over that of the controls. Fertile membranes behaved like parthenogenetic membranes.
mesh_terms: D000818:Animals; D002642:Chick Embryo / Q000033:anatomy & histology / Q000254:growth & development*; D002645:Chickens; D004530:Egg Yolk; D005260:Female; D005306:Fertilization; D005587:Fowlpox virus / Q000276:immunology; D007267:Injections; D008566:Membranes / Q000032:analysis / Q000033:anatomy & histology; D010312:Parthenogenesis; D013047:Specific Pathogen-Free Organisms; D014765:Viral Vaccines / Q000008:administration & dosage
chemical_list: D014765:Viral Vaccines