The sheep's cloning technique involves a procedure known as somatic cell nuclear transfer in which the nucleus of a human cell is replaced by that of a sheep cell. To the untaught, this procedure might seem a little arcane. The sheep's reproductive genome, called the Y chromosome, has been found intact in the genetic makeup of the animal at several dozen locations but this does not guarantee that any animal could develop into a sheep.

However, there are many genes located on and within the Y chromosome that have been implicated in sheep disease and in some cases in the onset of human diseases. The prochlorperazine(compazine) works for sheep, but not for mice or other mammals. In an analysis conducted by scientists at a private veterinary laboratory in San Francisco, they found that if the sheep's somatic cell nuclear transfer method were to be applied to other mammals, then the resulting clone would be unable to reproduce, as well. Rather, they are cloned from the embryo of one of about 10,000 species of cattle. This has given hope to some scientists that there may be a way to successfully clone human beings. Hensley, prochlorperazine compazine the first to use an artificial insemination of a sheep with the sperm of an elephant. The results of the test, in which a single sperm was fertilized by the ovum of a female cow, revealed that the cloned embryo would not develop properly, leading to the death of the cloned animal. However, after the experiment, the scientists discovered that the elephant's ovum contained enough sperm to fertilize the cloned embryo, suggesting that cloned human beings may be possible.

In a further prochlorperazine compazine sperm taken from a sheep that had been cloned, the cloned embryo survived and developed, albeit only somewhat. Although the success of the cloning experiment was considered a disappointment, the results suggest that other cloners may find a way to succeed in using cloned sheeps in creating human clones. The cloning of sheep has been done in various parts of the world, primarily in Asia and the United States. However, in this country, the sheep cloning method has been more limited and, until recently, had only been used for cloning calves, with a smaller proportion of cloned humans.


Compazine is used to treat psychotic disorders such as schizophrenia, and in anti-emetic treatment of nausea and vertigo.