<span>False. A condition in which gametes are the same size and shape is isogamy. </span>
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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Sea-floor spreading ovcurs at divergent boundaries which statement best identifies the geologic process taking place at the point where sea floor spreading occurs
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Umm im a Christian and dont believe in the big bang but i do like to help people but the best one is the Radiation is detected in every direction due to the discovery in the 1960s of cosmic microwave background radiation.
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im pretty sure that the answer is b, because the plankton decrease growth in the winter.
hope this helps, plz vote me the brainliest :)
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