Definition of Gene Mutation
Gene mutation is the change in the sequence of DNA of a single gene that is relatively very small. It is a permanent change in the sequence and hence the gene becomes different from those which are found in other people. The mutation in genes is of two types i.e. hereditary mutation and acquired mutation. The mutation that is inherited by the offspring from the parents is termed as hereditary mutation.
This mutation is present in the egg or sperm’s cells and when they unite, thee zygote has that mutation too in its genetic material. On the other hand, the mutation that can occur anytime during the life of a person and that affects only a certain type of cells is called an acquired mutation. These are caused by some environmental factors such as exposure to radiations. They cannot be passed onto the next generation.