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Sheep Cloned

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THE STORY ABOUT DOLLY SHEEP.
In 1995 and 1996, researchers at the Roslin Institute in Edinburgh, Scotland, cloned mammals for the first time. Keith Campbell, Jim McWhir, William Ritchie, and Ian Wilmut cloned two sheep, Megan and Morag, using sheep embryo cells. The experiments indicated how to reprogram nuclei from differentiated cells to produce live offspring, and that a single population of differentiated cells could produce multiple offspring. They reported their results in the article "Sheep Cloned by Nuclear Transfer from a Cultured Cell Line" in March 1996. This experiment led the Roslin team to later clone mammals from adult body cells and to genetically engineer mammals.
Several clones had been produced in the laboratory before Dolly, including frogs, mice, and cows, which had all been been cloned from the DNA from embryos. Dolly was remarkable in being the first mammal to be cloned from an adult cell. This was major scientific achievement as it demonstrated that the DNA from adult cells, despite having specialized particular type of cell, can be used to create an entire organism.
How dolly was cloned, animal cloning from an adult cell is much more difficult than from an embryonic cell. So when scientists working at the roslin …show more content…
Using two distinct breeds of sheep ensured that the offspring produced were the result of cloning and not the result of eggs fertilized within the oviduct. Scottish Blackface sheep provided the oocytes, which had nuclei removed (enucleated) and which became the receiving enucleated oocytes. These sheep constituted the first of the four groups used. The scientists obtained the oocytes by injecting ewes with a follicle-stimulating hormone, called gonadotropin-releasing hormone, which facilitates the release of oocytes from the ewes' ovarian follicles. The scientists flushed out the oocytes from the ewes' fallopian tubes with a saline solution then collected the

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