i believe the answer is d. hope it helps
I think it’s F, c, and a.
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.
Learn more about Sickle-cell anemia on
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Egg proteins are necessary for an embryonic development
Answer: Not Copy RIght
Explanation:
Pluto is considered a dwarf planet because it does not pass around its orbit. It orbits a disc-shaped zone beyond the orbit of Neptune called the Kuiper Belt, a distant region occupied by frozen corpses left over from the formation of the solar system.
