Mitosis:

Mitosis is a type of division in which a cell divides into two daughter cells each with the genetic equivalent to that of the parent cell i.e. same number of chromosomes that were present in the parent cell.

Occurrence of Mitosis:

Because each resultant daughter cell should be genetically identical to the parent, the parent cell must make each copy of the chromosome before mitosis. This occurs during S-phase of interphase. Mitosis occurs exclusively in Eukaryotic cells. In multicellular organisms, the somatic cells undergo mitosis.