Question

Which one of the following is also called as 'Sewall Wright effect'.

• A. Gene flow
• B. Isolation
• C. Gene pool
• D. Genetic drift

Answer 1

The correct option is D Genetic drift

Genetic drift is also called as genetic sampling error or 'Sewall Wright effect', a change in the gene pool of a small population that takes place strictly by chance. Genetic drift can result in genetic traits being lost from a population or becoming widespread in a population without respect to the survival or reproductive value of the alleles involved.

Genetic drift (or allelic drift) is the change in the frequency of a gene variant (allele) in a population due to random sampling of organisms.