Individuals who are heterozygous for sickle-cell anemia have a greater resistance to
A) malaria.
B) diphtheria.
C) cholera.
D) typhoid fever.
E) all of these.

Question

Quizplus · Accepted Answer

Heterozygous individuals for sickle-cell anemia have a genetic advantage against malaria because the alteration of their red blood cells makes it more difficult for the malaria parasite to survive within them. However, they do not have any greater resistance to diphtheria, cholera, or typhoid fever.

Individuals Who Are Heterozygous for Sickle-Cell Anemia Have a Greater