Question

Questino 7. How I genetic drift different from natural selection?

A. Natural Selection occurs because some alleles confer higher fitness, whereas genetic drift occurs because of sampling error.

B. Natural selection has a stronger effect in large population, whereas genetic drift acts primarily in small populations.

C. Natural selection is a mechanism of evoltion, whereas genetic drift is not a mechnaism but an outcome of evolution.

D. Natrual selection tends to cause very rapid evolution whereas gentic drift tends to operate on much longer time scales.

Answer 1

Answer: A

As the number of organisms increases it will lead to variations. Out of these variations, suitable variation will be selected by nature

Genetic drift is sampling error in small size of population. Genetic variation will be decrease because of genetic drift. Genetic drift is functional in all populations but it has stronger effect in small size population.

Genetic drift is also mechanism of evolution.