Question

what disease does sickle cell trait protect against?
○ abnormal blood clotting
○ sickle cell disease
○ anemia
○ malaria
○ abnormal bleeding

Explanation:

Sickle cell trait (heterozygous for the sickle cell allele) provides some protection against malaria. The abnormal red blood cells (due to the sickle cell trait) are less hospitable to the malaria parasite (Plasmodium) compared to normal red blood cells. Malaria parasites have a harder time surviving and multiplying in these cells. Abnormal blood clotting is not related to protection from sickle cell trait. Sickle cell disease is more severe than sickle cell trait (homozygous for the sickle cell allele), so trait doesn't protect against the disease itself. Anemia can be a symptom of sickle cell trait (mild anemia in some cases) rather than something it protects against. Abnormal bleeding is not a condition that sickle cell trait protects against.

Answer:

malaria