Hemoglobin Alpha Three Copies Deleted Genotype

**Semantic type:** Laboratory or Test Result

**Definition:** A genetic finding indicating that one copy of chromosome 16 has only one functional copy of a hemoglobin alpha (HBA) gene and the other copy of has no functional HBA genes. This genotype is associated with hemoglobin H disease.

**Synonyms:** - (--/-a) - (--/a-) - (-a;--) - (a-/--) - --/-a - --/a- - -a/-- - HBA Three Copies Deleted Genotype - a-/-- - alpha-globin genotype ( - - / a - )