Which of the following is true of individuals who inherited the sickle-cell trait from one parent and a normal gene from the other parent?
A) They were favoured by natural selection.
B) They succumbed to malaria but did not die.
C) They had no natural defence to malaria.
D) They usually died of anthropogenesis.

Question

Quizplus · Accepted Answer

Individuals with one sickle-cell gene and one normal gene (heterozygotes) have a resistance to malaria, which is an advantage in regions where malaria is prevalent. This resistance is why the sickle-cell trait was favored by natural selection in these areas.

Which of the Following Is True of Individuals Who Inherited