Aperson with a genotype of hbss has sickle cell disease. a person with a genotype of hbas allele carries the sickle cell trait. a person with a genotype of hbaa does not have sickle cell disease and does not carry the trait. the punnett square shows the genotype of two people carrying the sickle cell trait. what are the chances that their offspring will have sickle cell anemia?
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The gene that causes sickle-cell disease is present in a higher percentage of residents of sub-saharan africa than among those of african descent living in the united states. even though this gene causes sickle-cell disease, it also provides some protection from malaria, a serious disease that is widespread in sub-saharan africa but absent in the united states. discuss an evolutionary process that could account for the different percentages of the sickle-cell gene among residents of the two regions.
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Aperson with a genotype of hbss has sickle cell disease. a person with a genotype of hbas allele car...
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