Types of Mutations
According to the structures in which changes occur, mutations can be grouped into two categories.
(1) Somatic mutation,
If the change of genetic material occurred in somatic cells, it is called the somatic mutation. It is not necessary for somatic mutation to bring in observable changes. Also, the change would not be conveyed to the next generation.
(2) Germinal mutation,
If the change of genetic material occurred in germ cells, it is called the germinal mutation. This change would be inherited to the next generation, and it is definited that the new trait would occur in their offspring. The level of wide-spreading is dependent on the level of development of the germ cell. If mutation occurs in germ mother cells, a great number of gametes (sperms or eggs) would be affected, and the duration of production of these changed gametes would be rather long. If mutation occurs in specific gametes (sperms or eggs), only specific gametes are affected and the duration of effect is short. The effect would be removed if they are not fertilized.
(23.05.2007)
