Cow cloning research

Cow cloning research

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Caption: Cow cloning. Dr Jonathan Hill working in his laboratory at Texas A&M University, USA, in 1999. He is working with a cow oocyte (round on monitor at left) during an attempt to clone a Brahman bull named Chance. To clone a cow an oocyte is taken from a female and its nuclear material is removed. Genetic material is taken from a body (somatic) cell of the animal to be cloned and injected into the empty nucleus. The resulting cloned oocyte is grown to the embryo stage and then implanted in a foster cow's uterus. It took 189 attempts to clone Chance. The clone, named Second Chance, was the first calf cloned from an adult male.

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