Question

What does Bottle neck effect tells and who proposed it?

Answer 1

Bottle neck effect was proposed by Stebbins.

- Shrinkage of population due to some climatic factors or natural calamities.

- Bottle neck leads to reduction in availability of allelic frequencies.

- Reduction in allelic frequencies may make population prone to disease.

- Some gene/allele of bottle neck may show resistance and will result in flourishment of population.

Answer 2

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The bottleneck effect is an extreme example of genetic drift that happens when the size of a population is severely reduced. Events like natural disasters (earthquakes, floods, fires) can decimate a population, killing most individuals and leaving behind a small, random assortment of survivors.