Hemoglobin Alpha trans-Deletion Genotype

**Semantic type:** Laboratory or Test Result

**Definition:** A genetic finding indicating that both copies of chromosome 16 each have only one functional hemoglobin alpha (HBA) gene. This genotype is associated with the alpha thalassemia trait.

**Synonyms:** - (-a/-a) - (a-/a-) - -a/-a - HBA trans-Deletion Genotype - a-/a- - alpha-globin genotype ( a - / a - )