Hemoglobin Alpha cis-Deletion Genotype

**Semantic type:** Laboratory or Test Result

**Definition:** A genetic finding indicating that one copy of chromosome 16 has two functional copies of the hemoglobin alpha (HBA) genes and the other copy of has no functional HBA genes. This genotype is associated with the alpha thalassemia trait.

**Synonyms:** - (--/aa) - (aa/--) - --/aa - HBA cis-Deletion Genotype - aa/-- - alpha-globin genotype ( - - / aa)