Question : Define the following with one example for each : (i) Genetic Drift. (ii) Natural selection. (iii) Reproductive isolation.

Question : Define the following with one example for each : (i) Genet

1.	Question : Define the following with one example for each : (i) Genetic Drift. (ii) Natural selection. (iii) Reproductive isolation.
Answer» Solution :(i) Genetic drift : It refers to the RANDOM change in gene FREQUENCIES in a small POPULATION, presumably owing to change rather than natural selection, thereby providing diversity without any adaptations. (ii) Natural selection : In this new suitable traits are selected to LIVE in the prevailing environment. (III) Reproductive isolation : When same members of a particular species are not able to mate with other members of the same species due to environmental barriers or due to other geographical barriers , it is known as reproductive isolation.