Why does sickle cell disease cause death?
a. The malformed blood cells assume a sickle shape.
b. The malformed red blood cells cannot transport oxygen.
c. The malformed red blood cells cannot enter capillaries and, in fact, block them.
d. The patient has two copies of the mutant gene.
Answer: c. The malformed red blood cells cannot enter capillaries and, in fact, block them.
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