In the case of the gene that codes for sickle-cell anemia, a very dry climate would...
In the case of the gene that codes for sickle-cell anemia, a very dry climate would have a selective advantage for:
A. heterozygotes and homozygotes for the sickle-cell allele.
B. homozygotes for the wild-type allele.
C. homozygotes for the sickle-cell allele.
D. homozygotes for the wild-type allele and homozygotes for the sickle-cell allele.
E. heterozygotes.
Homework Answers
The sickle cell anemia give advantage from malaria disease. But in dry climate, mosquitoes are scarce and so is the malaria. So the sickle cell condition has no advantage there. Even the heterozygote have slightly sickle RBCs and hence they are also not advantageous. Hence answer is option B. Homozygotes for wild type allele.
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