describe briefly four way in which indinduals with a particular traits may increase is a problem
Answers
variations occur which is different from other
cannot adapt to other environment adaptation
only one type of species increase hence leading to a major cause of genetic drift
at last a cause of diseases if in more number
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Traits arise due to variations which occur due to sexual reproduction of inaccuracies during DNA copying or environmental factors. Now, the individuals with a particular trait may increase in a population due to the following factors :
(i) Natural selection: Those variations which give survival advantage to an organism are selected in nature and such traits increase in population.
(ii) Genetic drift: It occurs due to change in gene frequency due to accumulation of particular type of genes.
(iii) Geographical isolation: It leads to change in gene frequency leading to expression of one type of traits in a geographically isolated population.
(iv) Migration: It leads to flow of a particular type of gene in a specified population.
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