Dolly's successful birth is of great significance to the commercialization of cloning technology. Because, when a small number of transgenic animals are cultivated by nuclear transfer technology, there is no need to use cloning, and more improved offspring can be obtained through normal pregnancy and delivery like Dolly. Bonnie's father David is an ordinary Welsh goat, and Dolly got pregnant at the end of 1997. After Bonnie was born, the researchers observed the situation of the mother and daughter for a period of time to make sure they were safe. In order to give Bonnie and Dolly time to contact each other without external interference, scientists delayed about 10 to officially release the news that Dolly is her mother.
Some people say that Dr. wilmot is Dolly's "father". From 65438 to 0997, Mr. wilmot, 52, had a successful career. Together with several scientists, he successfully bred Dolly, the world's first cloned sheep. In order to ensure that this achievement is recognized by the world, they applied for a patent. Just a few months after Dolly was successfully born, they announced the news that shocked the world to the whole world.
Dolly the sheep has brought great shock and joy to the world, as well as trouble and impact. About 2.5 billion people in the world know its name. When Dolly was a child, she looked no different from other little sheep. It has curved and slender wool, a tender pink nose and a small red identity tag on its right ear. Its naughty appearance is as cute as other little sheep. 1On May 20th, 997, Roslin Institute sheared Dolly's sheep for the first time.
1999, Dolly's family welcomed three lovely little sheep. At that time, Dolly, the mother of four children, looked rich and kind. Just at the beginning of a happy life, the bad news came: scientists at Roslin Institute 1999 announced that cells in Dolly's body began to show symptoms peculiar to old animals. In terms of natural age, Dolly is only three or four years old, or in her thirties.
As a symbol of cloning technology and its application, Dolly brought controversy and left a mystery. Among them, the biggest mystery is: Is the cloned animal premature? According to the veterinary diagnosis, Dolly suffers from severe progressive lung disease. The so-called "progressive" disease refers to the continuous development and deterioration of the disease, and life is at stake. In view of this situation, the institute decided to euthanize Dolly. They can't bear to watch Dolly die of depression, and hope that this lovely little sheep, which once enjoyed the happiness of life and brought countless surprises to the world, will leave peacefully. Under normal circumstances, the life span of sheep can be as long as 12 years, but Dolly, the cloned sheep, only lived half of that of ordinary sheep. Because cloned animals are derived from somatic cells of adult animals, theoretically, they are the same age as the animals from which they come.