Dolly cultural definition

The first mammal successfully cloned — Dolly, a sheep — was born in 1996 in Scotland as the result of work by biologist Ian Wilmut (see clone). The procedure that produced Dolly involved removing the nucleus from an egg cell and placing the nucleus of an adult sheep's mammary cell into it. Further manipulations caused the egg to “turn on” all genes and develop like a normal zygote. (See totipotency.)