title: The X-linked blood group system Xg. Tests on unrelated people and families of northern European ancestry.
mesh_terms: D001789:Blood Group Antigens; D005060:Europe; D005260:Female; D005787:Gene Frequency; D008040:Genetic Linkage; D005828:Genetics, Population; D005838:Genotype; D006801:Humans; D008297:Male; D010641:Phenotype; D012730:Sex Chromosomes; D012737:Sex Factors
chemical_list: D001789:Blood Group Antigens