In beta thalassemia intermedia B0/B+, there is one completely deleted or inactive beta chain gene, while the other is partially deleted or inactive.
This state also results in Hb A production of 55%–75% of normal.
Harmening, D. (2009). Clinical nematology and fundamentals of hemostatis. (5th ed.). FA Davis.
In beta thalassemia intermedia B0/B, there is one completely deleted or inactive beta chain gene, while the other is completely normal. (not shown)