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

A small population of a species faces a greater threat of extinction than a larger population. This is because small population has small number of individuals in a species. Fewer number of individual in a species impose extensive inbreeding among them. Thus, less number of individuals imparts lesser changes in production of genetic variation. Lack of genetic diversity, makes small population of a species more prone to extinction under any environmental changes.