Genetic heterogeneity.
D000483:Alleles; D005787:Gene Frequency; D005826:Genetics, Medical; D005828:Genetics, Population; D006455:Hemoglobins, Abnormal / Q000032:analysis; D006801:Humans; D008661:Metabolism, Inborn Errors / Q000235:genetics; D011506:Proteins / Q000032:analysis
D006455:Hemoglobins, Abnormal; D011506:Proteins