What are the different ways in which individuals with a particular trait may increase in a population?



Individuals with a particular trait may increase in a population due to Natural selection and Genetic drift .


For Example -

Natural selection:

  • The variation became a common characteristic due to its survival advantage .
  • This is known as Natural Selection - An adaptation to fit in the environment better.
  • Natural Selection was introduced as a concept by Charles Darwin.

Genetic drift:


  • Accidents in small populations can change the frequency of some genes in a population
  • This is known as Genetic Drift .
  • This is not a survival advantage . It happens purely due to chance.
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CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo