Imagine two population of a gharial, one in the Chambal river and other one in the Ganga. Now imagine two scenarios: A) the populations breed separately, B) Adults of both populations migrate yearly to interbreed. Which scenario would result in a greater loss of genetic diversity, if the Chambal river population is driven to extinction by anthropogenic factors?
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Scenario A
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Scenario B
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No loss of genetic diversity in either scenario
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Increase in genetic diversity