2006-11-23 11:53:29 · 4 answers · asked by nattie026 1 in Science & Mathematics ➔ Biology
Her name was Dolly. She was cloned in Scotland, the first cloned mammal. Originally her name was a case number, but she was dubbed "Dolly" -- after Dolly Parton -- because she was cloned from a breast cell.
Dolly died at a premature age, six, believed in part caused by her having been cloned from a mature, six-year old ewe. Dolly had shown signs of having middle-aged sheep diseases at an early age, and it has been surmised that starting from an older cell may have been the cause. Dolly displayed dehabilitating arthritis and lung disease, and was euthanized.
Her legacy is that, based upon the problems that followed Dolly after a successful cloning, that cloning experiments on humans would be unethical. This has not kept scientists from cloning, and attempting cloning, on other species.
2006-11-23 12:05:55 · answer #1 · answered by Petals 4 · 0⤊ 0⤋
This is how it worked.
They used 3 different kinds of sheep. We'll call them A, B, C.
They took an egg from sheep A. They removed a mammary cell from sheep B and placed it into the egg of sheep A. Now, most cells are differentiated (they do different things in different parts of the body--you don't have heart cells in your liver), and these mammary cells were able to "de-differentiate" from mammary cells into cells for all parts of the body. Out of the many times that this experiment was attempted, the cells only de-differentiated a few times. This is something that is not under the control of the experimenter.
The egg from A with the nucleus and DNA from B was then implanted into sheep C. The use of 3 different kinds of sheep helped prove that cloning really occurred.
Out of the one successful de-differentiation of cells, a sheep was born and named "Dolly" after Dolly Parton.....well, Dolly Parton has big breasts, and the cell for the cloned sheep came from mammary tissue (breast tissue). What an honor, hey? haha
2006-11-23 20:41:55 · answer #2 · answered by TheAutumnPhoenix 3 · 0⤊ 1⤋
Good advice. Also, I recall that the cloned offspring evidently aged more rapidly than a natural rate. Some scientists think that there's some sort of clock in our DNA so that cloning is not without problems.
Do a search, I find Wikipedia good for such things.
2006-11-23 19:58:44 · answer #3 · answered by modulo_function 7 · 0⤊ 0⤋
her name was dolly. look her up on a search engine
2006-11-23 19:54:42 · answer #4 · answered by horslover10 2 · 1⤊ 0⤋