The idea of ​​the possibility of cloning has long interested scientists around the world. The ability to create other life without needing to reproduce, just a petri dish and a few cells, is something that has been attempted for decades. There are endless possibilities of uses that cloning could bring, and it excites many and terrifies others as well. It was in 1997 that a major breakthrough in the field of cloning took place: the “birth” of Dolly the sheep. Dolly was cloned from an adult sheep in Scotland. Dolly was the beginning of experimentation with cloning complete mammals. We are now cloning many mice and claves, all cloned from adult cells, which still fascinates many scientists today. However, the idea of ​​cloning and cloning has already been realized; However, now that a complete mammal cloned from an adult cell was successful, it sparked the idea of ​​eventually cloning a complete human. Many experiments have been carried out with the idea of ​​cloning and the questioning of the replication process during cell division; experiments were carried out as early as 1888. They began with experimentation on a two-celled amphibian embryo and discovered some genes lost during cell replication. From then on, experiments became increasingly sophisticated and these early nuclear cloning experiments confirmed that “the complete genome is replicated during cell division, at least at the beginning of cleavage” (McKinnell, 1999). These experiments form the basis of modern cloning experiments aimed at studying the genomic capacity of adult embryonic cells. Studies and experiments on cloning are carried out all over the world: the United States, England, France, China and Japan are all involved in the field of cloning and the possibilities it can... ... middle of paper... ...the use of xenotransplantation cloning will continue to be an area of ​​endless possibilities and possible benefits to the medical world. Works Cited McKinnell, Robert G. and Marie A. Di Berardino. “The biology of cloning: history and justification.” » BioScience 49.11 (1999): 875-83. PrintBremier, Michael E. “Xenotransplant News.” Transplant News (2008): 353-55. 2008. Internet. March 13, 2011Kubota, XC and X. Yang. “Cloning of aged animals: a medical model for tissue and organ regeneration.” TMC 11.8 (2001): 313-17. ScienceDirect. Internet. March 13, 2011. Hilmert, Laura J. “Human Organ Cloning: Potential Sources and Ownership Implications.” Indiana Law Journal (2001). Internet. March 13, 2011 Koh, Chester J. and Anthony Atala. “Therapeutic cloning applications for organ transplantation.” Transplant Immunology 12 (2004). ScienceDirect. Internet. March 13. 2011