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A very small population of a species fac...

A very small population of a species faces a greater threat of extinction than a larger population. Provide a suitable genetic explanation.

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• The frequency of genes in smaller populations can easily be altered due to accidents or unprecedented catastrophic events even if the genes had survival advantage. This can lead to extinction of the species.
• Smaller populations have fewer variations compared to larger populations as there is extensive interbreeding that reduces the appearance of variations. This would be a disadvantage to the population as it would lead to extinction during drastic environmental changes, if any.
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