Any sudden change in the genetic material is known as MUTATION.Mutation may occure at GENE LEVEL or CHROMOSOMAL LEVEL. TYPES: Missence mutation. Nonsence mutation. Sielent mutation. Frame shift mutation.
Two types of gene mutations are chromosomal and point mutation. Chromosomal mutation alters a cell's chromosomes, while point mutation replaces single-base pair nucleotides with other nucleotides found in RNA or DNA.