Final answer:
A person with beta thalassemia intermedia may present with mild to moderate anemia, splenomegaly, gallstones, and jaundice due to anemia and irregular bone growth. They experience hypoxia due to impaired hemoglobin function and can develop iron overload without frequent blood transfusions.
Step-by-step explanation:
A person with beta thalassemia intermedia may exhibit various clinical characteristics due to the mutation causing decreased synthesis of the beta-globin chain of hemoglobin.
Diagnostic methods include blood tests showing low hemoglobin (hypochromic cells), high levels of HbA2 and HbF, and a genetic analysis that detects mutations at various sites in the beta-globin gene linked to the disease.