Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Thalassemia ?
    ### Response:
    Is genetic testing available for thalassemia? Yes, genetic testing is available for HBB, HBA1 and HBA2, the genes known to cause thalassemia. Carrier testing for at-risk relatives and prenatal testing are possible if the disease-causing mutations in the family are known.
    