Which of the Following Statements Regarding Sickle-Cell Disease Is False

Multiple Choice

Which of the following statements regarding sickle-cell disease is false?

A) Persons who are heterozygous for sickle-cell disease are also resistant to malaria.
B) Sickle-cell disease causes white blood cells to be sickle-shaped.
C) All of the symptoms of sickle-cell disease result from the actions of just one allele.
D) About 1 in 10 African Americans is a carrier of sickle-cell disease.