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Evolution by Natural Selection

Define natura...

Question

Define natural selection, genetic drift.

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Solution

Natural selection is the process of adaption of an organism to its environment by means of selectively reproducing changes in its genotype or its genetic constitution.
Genetic drift is defined as a change in the allele frequency of a population over time due to a random selection of certain genes.

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Q. List the differences between natural selection and genetic drift.

Q. How many of the following is responsible for speciation?

(a) Mutation
(b) Geographical isolation
(c) Genetic drift
(d) Natural selection
(e) Reproductive isolation

Q. (A)The effects of genetic drift are most apparent in small populations.
(B)Evolution and natural selection is most prominent in populations having no variations.

Q. Please give simple definition of geographical isolation, genetic drift and natural selection.

Q. Explain in brief the role of natural selection and genetic drift in evolution.

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Evolution by Natural Selection

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