Changes in gene structure. For some reason, the species, quantity and arrangement order of nucleotides that make up the gene have changed, which leads to the change of the gene. There are two kinds of induced mutation caused by artificial radiation or chemical treatment and non-artificial natural mutation. The change of gene structure often makes the traits determined by the original gene mutate and appear mutants.

Word decomposition

The basic unit of biological inheritance that exists on the chromosome of a cell.