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Dolly the Sheep was the first mammal cloned from adult DNA. Dolly was born July 6, 1996 but her birth was
not announced until 1997. She was created using the Reproductive Cloning and Somatic Cell Nuclear Transfer styles.
Reproductive Cloning is used to create an animal that has the same nuclear DNA as another existing or previously
existing animal. Scientists transferred genetic material from the nucleus of a donor adult cell to an egg with out a nucleus.
The egg will have no genetic material. The egg that now has the DNA from the donor will receive a chemicals
treatment to help the cell division. After all that is done and the cell has reached the right stage
it will be transferred to the uterus of a female host who will carry until birth. |
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< http://ornl.gov/sci/techresources/Human_Genome/elsi/cloning.shtml > |
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If Dolly was created using Nuclear Transfer, it would not be an identical clone of the donor
animal. Only Dollys nuclear DNA would be the same as the donors. The clone would have some of the genetic materials from
the mitochondria. The Mitochondria has it own short segments of DNA and which helps play a big role in the aging process.
Cloning Dolly the Sheep was a big step for the cloning scientist because it proved
that the genetic materials from an adult cell can be reprogrammed to create a new organism.
< http://ornl.gov/sci/techresources/Human_Genome/elsi/cloning.shtml >
Dolly was able to reproduce and had six offspring of her own but no one has heard about their health after their
mother was put down.
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Scientists did not plan for what happened for what happened to Dolly a couple of year after her birth. Dolly started
to suffer from lung cancer and crippling arthritis which forced them to put her down by lethal injection on February
14, 2003. They did not think ahead about the problems that could occur to Dolly and made Dolly a risk to not only her life
but the lives of her offspring and the lives of us humans.
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