Hemoglobin Beta Heterozygous Null Genotype

**Semantic type:** Laboratory or Test Result

**Definition:** A genetic finding indicating that one copy of chromosome 16 has a functional copy (B) of the hemoglobin beta gene (HBB) and the other copy has HBB loss of function or gene deletion mutations (B0). This genotype is associated with beta thalassemia minor.

**Synonyms:** - (B/B0) - (B0/B) - B/B0 - B0/B - HBB Heterozygous Null Genotype - beta-globin genotype (B/B0)