SOMATIC MUTATIONS:
Mutation affecting the somatic cells of an individual. Thus, individuals appear to have two different cell lines with different genotype. Once a cell undergoes a mutation, all cells derived from it by mitotic divisions inherit the mutation. That new individual will possess a group of cells with a genotype different to the rest, and sooner if there because the mutation in the development of the individual the greater the proportion of cells with different genotype. In the event that the mutation had occurred after the first division of the zygote, half the cells in the adult individual would have a genotype and the other half a different. Mutations affecting only the cells of the line somatic not transmitted to the next generation. One can know the origin and past the cells of multicellular organisms to analyze somatic mutations present in these cells.
Mutation affecting the somatic cells of an individual. Thus, individuals appear to have two different cell lines with different genotype. Once a cell undergoes a mutation, all cells derived from it by mitotic divisions inherit the mutation. That new individual will possess a group of cells with a genotype different to the rest, and sooner if there because the mutation in the development of the individual the greater the proportion of cells with different genotype. In the event that the mutation had occurred after the first division of the zygote, half the cells in the adult individual would have a genotype and the other half a different. Mutations affecting only the cells of the line somatic not transmitted to the next generation. One can know the origin and past the cells of multicellular organisms to analyze somatic mutations present in these cells.
For example, the color yellow apple half of this was caused by a somatic mutation, so that their seeds are not carriers of the mutation.