What process is commonly used to produce identical genetic individuals?

The process commonly used to produce identical genetic individuals is cloning. Cloning is a technique that involves creating a genetically identical copy of an organism. This can be achieved through various methods, such as somatic cell nuclear transfer, where the nucleus of a somatic cell is transferred into an enucleated egg cell, leading to the development of an organism that has the same genetic makeup as the donor organism.

Other processes listed, such as fertilization, mitotic division, and gametic fusion, serve different functions in genetics. Fertilization involves the fusion of male and female gametes to form a zygote, resulting in offspring that are genetically distinct from the parents. Mitotic division is a form of cell division that produces two identical daughter cells for growth and repair rather than cloning an entire organism. Gametic fusion specifically refers to the combination of gametes during fertilization, increasing genetic diversity rather than producing identical individuals. Thus, cloning is the correct answer as it directly produces identical genetic copies.