On 5th of July 1996 a lamb was born at the Roslins Research institute near Edinburgh. It was an apparently normal event, yet it marked the achievement of a Milestone in biological science. The lamb was a clone, and was named Dolly. It was the first organism to be cloned from adult differentiated cells, which is what makes the achievement such a ground-breaking event. In this organism cloning, the aim is to generate an organism from a cell that carries a complete set of genetic instructions. So what is the technique of cloning and what is the history of Dolly?
1- Early thoughts and experiments:
The announcement of the birth of Dolly, in the journal “Nature” in February 1997, rocked the scientific community. However, the basic scie
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