MAURO FERMARIELLO / SCIENCE PHOTO LIBRARY MAURO FERMARIELLO / SCIENCE PHOTO LIBRARY
Cloning research. Researcher holding a tube containing liquid medium for the maturation of sheep oocyte cells. Oocytes are collected from domestic sheep (Ovis aries) ovaries for use in cloning a rare type of wild sheep called a mouflon (Ovis orientalis musimon), which lives on the islands of Sardinia and Corsica. During cloning, nuclear material is removed from matured sheep oocytes and is replaced with that from mouflon body (somatic) cells. The resulting cloned oocyte is cultured to the embryo stage and implanted into a foster sheep for pregnancy. The first cloned mouflon was born by this method in October 2000 at Italy's University of Teramo.
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