title: A new case of crossing-over in the HL-A system.
mesh_terms: D000293:Adolescent; D000368:Aged; D000818:Animals; D003434:Crossing Over, Genetic; D003601:Cytotoxicity Tests, Immunologic; D005260:Female; D005838:Genotype; D006238:Haploidy; D006649:Histocompatibility Antigens; D006801:Humans; D007106:Immune Sera; D008297:Male; D008540:Meiosis; D008875:Middle Aged; D010375:Pedigree; D010641:Phenotype; D011817:Rabbits / Q000276:immunology
chemical_list: D006649:Histocompatibility Antigens; D007106:Immune Sera