In a small group of people living in a remote area, there is a high incidence of "blue-skin", a condition that results from a variation within the structure of the protein hemoglobin. all of the "blue-skinned" residents can trace their ancestry to one couple, who were among the original settlers of this region. the unusually high frequency of "blue-skin" in the area is an example of
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In a small group of people living in a remote area, there is a high incidence of "blue-skin", a cond...
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