Which of the following statements about individuals with the HbS allele in the homozygous form is TRUE?
A. They lack the capacity to digest lactose.
B. They rarely develop any form of sickle-cell anemia before reaching reproductive age.
C. They usually develop fatal cases of sickle-cell anemia.
D. They are usually found in temperate regions of the world.
E. They always develop fatal cases of sickle-cell anemia late in life.
Answer: C
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