While conducting research with a small population in South America you note that an overwhelming majority of individuals exhibit signs of a specific genetic abnormality. This is most likely the result of:

Question

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The overwhelming majority of individuals in a small population exhibiting signs of a specific genetic abnormality is most likely the result of founder effect, where a small group of individuals become separated from a larger population and establish a new population with limited genetic diversity. This can result in the concentration of certain genetic traits, including abnormalities, in the new population due to chance.

While Conducting Research with a Small Population in South America