No, the sickle-cell anemia allele won't be eliminated by natural selection.
Sickle-cell anemia trait is controlled by a single gene and the allele (S) for sickle-cell anemia is a harmful autosomal recessive.
It is caused by a mutation in the normal allele (A) for hemoglobin (a protein on red blood cells).
Heterozygotes (AS) with the sickle-cell allele are resistant to malaria, a deadly tropical disease. It is common in many African populations.
In these areas, (S) carriers have been naturally selected, because their red blood cells, containing some abnormal hemoglobin, tend to be in sickle shape when they are infected by the malarial parasite.
Therefore, they are more likely to survive and reproduce. This keeps the S allele in the gene pool.
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Answer:
Which two sense organs enable someone to run up a slope. Please state the explanation of each.
Sense organs that enables someone to run up a slope include eyes and nose
Explanation:
Eyes enables one to see where to run while nose ensure breathing is intact when making the run
the answer is ribose and I go it from Gradpoint
Here is the methodology associated with the process of a course assignment:
1. Faculty member develops assignment and grading rubric.
2. The assignment is posted in the class.
3. The student reads assignment and rubric.
4. Student completes the assignment.
5. Student submits the assignment.
6. Faculty reviews submitted assignment and compares to grading rubric.
7. Faculty grades assignment.
8. Student receives grade and feedback.
