what is genetic drift and natural selection


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GENETIC DRIFT:-When the frequency of some genes gets changed in a small population due to some accidental reasons, such phenomenon is known as Genetic Drift. Genetic drift can give rise to different changes in sub-populations. It is random and rarely produces adaptations to the environment.

NATURAL SELECTION:- It may be defined as a process that results in the increased

survival and reproductive success of individuals, who are well adjusted to the

environment. Theory of natural selection was given by Charles Robert Darwin

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Genetic Drift: The random change in the gene frequency by chance regardless of its being beneficial or harmful to the organism

Natural Selection: The process whereby organisms better adapted to their environment tend to survive and produce more offspring. The theory of its action was first fully expounded by Charles Darwin and is now believed to be the main process that brings about evolution

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genetic drift: elimination of breed of cetain traid (characters) when a section of species population migrates or dies due 2 natural calamities.

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