Define the following
(i) Frame shift mutations.
(ii) Genetic drift.

Explanation

(i) A frameshift mutation is a genetic muta tion caused by a deletion or insertion of one or more nucleotide pairs in a DNA sequence at one or more places that shifts the way the sequence is read. (ii) Genetic (gene frequency) or allele frequency drift refers to the change in a type of genes in a small population due to a random occurrence.