Define gene mutation

Explanation

Gene Mutation. Gene mutation is the change m expression of a gene which is caused by change in number, sequence and types of nucleotides. Gene mutation may occur due to change in a single nucleotide. It is called point mutation. Mutation due to change in more than one nucleotide pair is called gross mutation. Most of the gene mutations develop due to errors in DNA replication and transcription. It is called copy error mutation.