Question

What is Genetic drift and natural selection according to the Charles Darwin? Does it play essential role in Variation of the organism?

( CBSE - 10th Board Paper )

Answer 1

Sudden, random changes in frequency of some genes in the population is called genetic drift. It provides diversity without any classification.
Nature selects the fittest, it selects favorable traits and eliminate unfavorable ones.
It does plays a role in variations if organisms.