Which of the following statements about the HbS allele is FALSE?
A. It is found in higher gene frequencies in regions where malaria is endemic.
B. Heterozygous individuals have an increased immunity to malaria.
C. Homozygous individuals usually develop fatal cases of dysentery.
D. It causes sickle-cell anemia in homozygous individuals.
E. In areas where malaria has been reduced through drainage and insecticides, its frequency declines.
Answer: C
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