Explanation

‘Dolly’ was the name given to a clone of adult lamb by Ian Wilmut of Roslin Institute, Edinburgh, UK (Feb. 1997). Dolly was created by the scientists by extracting the genetic material (or nucleus) from udder cells and cytoplasm from unfertilized eggs. In fact, the genetic material from the udder cells of one sheep was implanted into another sheep’s egg after removing its genetic material. The fused cell developed into an embryo which was planted into the uterus of another sheep which acted as surrogate mother. Thus, Dolly had two genetic mothers as confirmed by the analysis of her mitochondria by Eric Schon and Ian Wilmut in 1999.