Question

which type of mutation causes sickle cell anemia?

Explanation:

Sickle - cell anemia is caused by a point mutation. A single - base substitution in the gene for the beta - globin chain of hemoglobin changes the sixth amino acid from glutamic acid (Glu) to valine (Val). This small change in the protein structure leads to the abnormal sickle - shape of red blood cells.

Answer:

Point mutation