theresaeleanor
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The gene for hemoglobin has two alleles, A and S. Normal adult hemoglobin is produced by the allele A. That molecule has a shape that allows it to bind with oxygen molecules. There is another hemoglobin allele, Allele S. Produces abnormal hemoglobin molecules, which causes red blood cells to have an abnormal shape (as in the image on the right (2) below) (options in the comments)

The gene for hemoglobin has two alleles A and S Normal adult hemoglobin is produced by the allele A That molecule has a shape that allows it to bind with oxygen class=

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articunojaz
I believe the answer to this is B.

B.)   There is a correlation between malaria infested regions and the allele frequency of sickle cell anemia, because the non sickle cell allele frequency is decreasing faster than the sickle cell allele frequency. The S allele is being selected for during natural selection in these areas.

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