Heterozygous sickle cell anemia gives protection against -: (A) G6PD, (B) Malaria, (C) Thalassemia, (D) Dengue fever
Answer is B. The possession of the sickle cell allele protects these individuals against malaria because the parasite dies when potassium leaks out of RBCs as they become sickle-shaped.
Types of anemia that have protective effect against P. falciparum malaria : -
G6PD deficiency, Sickle cell anemia, Thalassemia, HbC, Pyruvate kinase deficiency