
Remember Dolly? She was the first cloned mammal who baa-baaaa‘d her way into the public’s heart back in 1996. Unfortunately, Dolly was euthanized in 2003 when she was suffering with a respiratory illness and possible arthritis. But don’t feel bad, there’s still more than enough Dollys to go around! Four, in fact.
The University of Nottingham recently revealed that they are the proud owners of four exact replicas of Dolly. And they’re already reached three-and-a-half and reportedly doing fine.
In the past 15 years many animals have been successfully cloned, including several lines of sheep. There’s, frankly, nothing that groundbreaking about replicating an animal anymore. The creation of this particular cuddly quartet may owe more to advancing public relations rather than scientific knowledge.
There’s a public perception that cloned animals age prematurely, largely based on the untimely demise of Dolly. However, this may not be exactly accurate. According to Dr. Keith Campbell, one of the original Dolly scientists who also helped create this new generation, several cloned sheep have gone on to live (or are currently living) full sheepy lives well into their expected life spans.However, the general public remains largely unaware of these cases.
We’ve all heard how Dolly had truncated “telomeres,” the little pieces of spare DNA on the end of chromosomes that grow shorter with age. The public perception is that these dwarfed telomeres are what led to Dolly’s downfall. But the original research team would like to remind people that that Dolly came down with a lung infection, a common affliction among sheep living in closed quarters.
With this revelation of (what will hopefully prove to be) healthy
Dollys, cloning proponents hope to alter a skeptical public’s opinion of
a technology which may prove to be a valuable tool in the fight
against hunger and disease.
These four new Dollys also trumpet just how far we’ve advanced cloning techniques. While the original cloning was quite a feat, the process of what was once considered impossible has become near routine.
via SingularityHub