Directional selection has eliminated sickle-cell anemia from all human populations,except those in regions where diabetes is endemic.

Question

Quizplus · Accepted Answer

The statement is false. Directional selection has not eliminated sickle-cell anemia from all human populations, and it still exists in many parts of the world. Sickle-cell anemia provides some resistance to malaria, so it is more common in regions where malaria is endemic, not diabetes.

Directional Selection Has Eliminated Sickle-Cell Anemia from All Human Populations,except