Use the Following Information to Answer the Following Questions

Multiple Choice

Use the following information to answer the following questions.
In those parts of equatorial Africa where the malaria parasite is most common, the sickle-cell allele constitutes 20% of the β hemoglobin alleles in the human gene pool.
-If the sickle-cell allele is recessive, what proportion of the population should be susceptible to sickle-cell anemia under typical conditions?

A) 0.04
B) 0.16
C) 0.20
D) 0.32
E) 0.80