Dolly Sheep 'revived'

Scientists have revealed after Dolly's death, more than three years ago they cloned and released four other sheep using cells used to create Dolly. Therefore, the new group of sheep - with the name Dollies - is exactly the same as the original Dolly and mother sheep in terms of the genetic gene.

Dolly sheep descendants.Photo: Daily Mail

As the first cloned animal, Dolly attracted the attention of the world when she was born at Roslin University (Scotland) in 1996. Although Dolly is considered a lipstick in the biotechnology industry, but the landscape experts It will be prone to illness, miscarriage when mating and premature death. Five Dolly sheep were six, experts were forced to end their lives because animals suffered at the same time 3 arthritis, acute pneumonia and asthma.

Dollies are created to help scientists test whether technological advances can reduce the risk of disease for asexual reproduction. To get Dollies, the group used the mammary cells that once created Dolly - which was left over and frozen since then.

Professor Keith Campbell, who is taking care of the Dollies sheep at Nottingham University, said sheep are now living very well and experts are still monitoring their health. He said Dollies did not have any signs of ill health or asthma like Dolly in the past. Previously, to clone Dolly, scientists had to use a total of 227 eggs to select a good egg to clone. This time, the number of eggs used to replicate a Dollies sheep decreased to 5. However, Professor Campbell said that the clone technology has not been perfect until now and needs further improvement.