Hemoglobin levels in our bodies are lower than usual due to the genetic blood condition thalassemia.
Red blood cells can carry oxygen because hemoglobin is present.
Anemia brought on by thalassemia can make us feel exhausted.
The DNA of the cells that produce hemoglobin, the component of red blood cells that transports oxygen throughout the body, is mutated in thalassemia patients.
Thalassemia-related mutations are transferred from parents to offspring.