Define the following with one example for each :(i) Genetic Drift.(ii)

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

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

Answer»

(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.

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