John Harold Johnson Jr.'s death from sickle-cell anemia
a. resulted from a dominant gene.
b. is related to the anti-malarial effects of sickle cells in ancestral populations.
c. occurred because of the impoverished environment in which he grew up.
d. is an example of what can happen when an individual has a high mutation rate.
e. was caused by a bout of malaria in early childhood.
b. is related to the anti-malarial effects of sickle cells in ancestral populations.
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