Sickle-cell anemia is caused by the presence of _____ within the red blood cells.
A)hemoglobin S (HbS)
B)hemoglobin A₂ (HbA₂)
C)hemoglobin A (HbA)
D)fetal hemoglobin (HbF)

Question

Quizplus · Accepted Answer

Sickle-cell anemia is caused by the presence of abnormal hemoglobin, specifically hemoglobin S (HbS), within the red blood cells. This abnormal hemoglobin causes the red blood cells to stiffen and become sickle-shaped, which can lead to blockages in blood vessels and a reduced ability to carry oxygen. Hemoglobin A₂ (HbA₂), hemoglobin A (HbA), and fetal hemoglobin (HbF) are all normal types of hemoglobin that do not cause sickle-cell anemia.

Sickle-Cell Anemia Is Caused by the Presence of _____ Within