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 is always at a risk of degeneration and extinction due to
- Excessive inbreeding that brings about inbreeding depression or degeneration,
- Fewer recombinations and variations which are otherwise essential for maintaining vitality and vigour of the species.
- Lesser adaptability to changes in the environment,
- Increased threat to survival due to poaching, habitat destruction and environmental change.