The changing of the structure of a gene, caused by the alteration, deletion or rearrangement of single base units in DNA is known as Mutation. Mutations are of two types: Hereditary and acquired.
Hereditary : Mutations inherited from the parents are Hereditary mutations. They may be present in almost every cell in the body.
Acquired : Mutations caused due to environmental problems such as ultraviolet exposure and also errors during cell division are acquired mutations.
Sometimes, Mutations are a good thing because the process of evolution is by random mutation. Mutations help a species become better adapted to their environment by helping the members of the species not die.
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