A very small population of a species faces

Question:

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

Solution:

A small population is always at a risk of degeneration and extinction due to

  1. Excessive inbreeding that brings about inbreeding depression or degeneration,
  2. Fewer recombinations and variations which are otherwise essential for maintaining vitality and vigour of the species.
  3. Lesser adaptability to changes in the environment,
  4. Increased threat to survival due to poaching, habitat destruction and environmental change.

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