Question

Which mechanism of evolution affects genetic make up of a population?

• A. Natural selection
• B. Adaptation
• C. Genetic drift
• D. Gene mutation

Answer 1

The correct option is C 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.
  
• It gives rise to genetic changes in sub-populations leading to changes in it's makeup. It is random and rarely produces adaptations to the environment.
  

So, the correct answer is 'Genetic drift'