title: Colour vision defects and gene flow in Nigerians.
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D003117:Color Vision Defects / Q000453:epidemiology / Q000235:genetics*; D005260:Female; D005828:Genetics, Population; D006801:Humans; D008297:Male; D009549:Nigeria