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CC, or "copy cat", was the first cloned companion animal, born on December 22, 2001 at Texas A&M University's College of Veterinary Medicine and Biomedical Sciences. CC was created using nuclear transfer of DNA from cells derived from Rainbow, a female domestic shorthair cat. After the nuclear transfer was successful, scientists transferred the embryos into a surrogate mother, Allie, who gave birth to CC about two months later. CC had a white coat with a grey tabby pattern, while Rainbow was calico with patches of white, orange, and black fur. This difference in color is due to a process called X inactivation.