Question

what is genetic drift?

what is gene flow?

what is geographical isolation?

what is mutation?

what is natural selection?

Answer 1

• Genetic Drift: The elimination of genes of certain traits from the small population when a section of the species population dies of natural calamity or migrates to other region is called genetic drift.
• Geographical isolation:It is the physical separation of members of a population. It occurs when biological populations of the same species become isolated from each other to an extent that prevents with genetic interchange. Simply we can say, separation of populations of a species by geographic (distance, mountains, rivers, oceans, etc.) that lead to reproductive isolation of those populations.

• Natural selection: It is the phenomenon where in nature, in the wild, selects traits favourable to the species in its environment. Or we can say, Individuals with variations, that give them selective advantage, are favoured by nature.

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