We Continue to See Sickle-Cell Anemia in Certain Populations Because

Multiple Choice

We continue to see sickle-cell anemia in certain populations because the presence of one recessive gene for sickle-cell anemia

A) provides the individual with some level of protection from malaria.
B) is associated with longevity so the individual is more likely to pass the gene to his or her children.
C) also produces large amounts of human growth hormones (HGH) , which is beneficial.
D) makes the individual more resistant to the negative effects of stress.