Today, certain populations around the world exhibit genetic traits with origins that can be traced back to cultural changes undertaken by their ancestors. Match each of the present-day traits below to its ancestral origin.
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Northern Europe has the highest proportion of lactose-tolerant people in the world.
Many people in Africa exhibit the sickle-cell* trait.
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Inuits are able to metabolize high quantities of food rich with fatty acids while keeping their bloodstreams free of unhealthy levels of those fatty acids.
Many Polynesians today are at high risk for diabetes.
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Farming was difficult, so people turned toward cattle keeping.
People consumed a diet of fish meat, seal, and whale blubber.
Farming brought more malaria, and therefore intense selective pressure spreading genes for malaria resistance.
Long voyages in open canoes across empty ocean with little food favored those with genes for thriftier metabolisms.