Cloning

Cloning


Genetic engineering, altering the inherited characteristics of an organism in a

predetermined way, by introducing into it a piece of the genetic material of

another organism.  Genetic engineering offers the hope of cures for many

inherited diseases, once the problem of low efficiencies of effective transfer

of genetic material is overcome.


Another development has been the refinement of the technique called cloning,

which produces large numbers of genetically identical individuals by

transplanting whole cell nuclei.  With other techniques scientists can isolate

sections of DNA representing single genes, determine their nucleotide sequences,

and reproduce them in the laboratory.  This offers the possibility of creating

entirely new genes with commercially or medically desirable properties.


While the potential benefits of genetic engineering are considerable, so may be

the potential dangers.  For example, the introduction of cancer-causing genes

into a common infectious organism, such as the influenza virus, could be

hazardous.


We have come to believe that all human beings are equal; but even more firmly,

we are taught to believe each one of us is unique.  Is that idea undercut by

cloning? That is, if you can deliberately make any number of copies of an

individual, is each one special?  How special can clones feel, knowing they were

replicated like smile buttons.  "We aren't just our genes, we're a whole

collection of our experiences," says Albert Jonsen.  But the idea, he adds,

raises a host of issues, "from the fantastic to the profound."


When anesthesia was discovered in the 19th century, there was a speculation that

it would rob humans of the transforming experience of suffering.  When three

decades ago, James Watson and Francis Crick unraveled the genetic code, popular

discussion turned not to the new hope for vanquishing disease but to the specter

of genetically eng
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