1. Fusi cell involves fusing two cells of the same or different species to form a hybridoma or hybrid cell. 2. The process is used to produce antibodies for medical treatments and healthcare by fusing human and mouse cells for example. 3. Fusi cells have advantages like all clones having identical characteristics and fast reproduction of organisms that are difficult to breed, but disadvantages are all clones being susceptible to the same diseases or environmental changes and less genetic variation overall.