Which of the following is not true of sickle-cell anemia?
A) A carrier of one sickle-cell gene can benefit from it where malaria is common.
B) Sickle-cell anemia is most common among people of central African or Indian descent.
C) People who have two recessive genes for sickle-cell always have the disease.
D) Sickle-cell anemia is commonly passed from one generation to the next.
Correct Answer:
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