Sickle-cell anemia is an inherited disease that affects red blood cells. In people who have this
disease, one amino acid is substituted for
another amino acid in a blood protein. What
causes sickle-cell anemia?

i believe the answer is: returns on investments, no wages

people who belong in upper class society would most likely get there by obtaining multiple source of income, which a certain percentage of ownership for businesses. since most of them are job creator, they would most likely get their money from profit, not wages.

answer; biological;

answer; sutherland-differential association;

answer; english speaking;