The X-linked blood group system Xg tests on British, Northern American, and northern European unrelated people and families.
D001789:Blood Group Antigens; D002875:Chromosomes; D005060:Europe; D005260:Female; D005796:Genes; D005826:Genetics, Medical; D005828:Genetics, Population; D006801:Humans; D008297:Male; D009656:North America; D006113:United Kingdom; D044465:White People
D001789:Blood Group Antigens