Mutation due to change in gene because of

Solution (By Examveda Team)

The mutation is due to changes in genes because of Loss, Degeneration and Addition.
Mutations include changes as small as the substitution of a single DNA building block, or nucleotide base, with another nucleotide base.
Meanwhile, larger mutations can affect many genes on a chromosome. Along with substitutions, mutations can also be caused by insertions, deletions, or duplications of DNA sequences.