1.

Genetic drift is defined as (A) A random change in gene frequencies occurring by chance fluctuations (B) A change in an allele due to alteration in the DNA molecule (C) A change in gene frequencies due to exchange of genes between different populations (D) A product of natural selection.

Answer»

Correct option (A) A random change in gene frequencies occurring by chance fluctuations   

Explanation:

The elimination of the genes, of certain traits, from the small population when a section of the population dies of natural calamity or migrates to other region is called genetic drift. lt alters the gene frequency of the population.



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