You are right. A cloned animal or plant is an exact genetic duplicate of a single individual obtained without breeding. Some GMOs are also clones, but so are some non-GMOs. Grafting apple trees is a form of cloning, and without it we would not be able to propagate most types of apples.
Cloning animals is more complex, since we have to mimic the process of egg fertilization in order to have the resulting animal develop properly. The process of normal egg fertilization with sperm activates certain mechanisms in the egg that are still not fully understood; one of the reasons why cloning animals is still not a very efficient procedure.
The concern about using cloning is that if not controlled carefully you will end up with same problems that occur through inbreeding of purebred animals. Genetic diversity and mixing of genes through normal breeding is what ensures that animals can survive through the generations. Just look at the physical problems that can associated with some purebred breeds of horses, dogs and other animals where most of the breed can be traced back to only a handful of founder animals. Eventually the lack of genetic diversity leads to problems. Cloning will just accelerate this process.
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Today's Featured Article - Women and Tractors - More Views From the Farmer's Wife - by Teri Burkholder. The top ten reasons why the judges wouldn't let you participate in the stock antique tractor pull: Hey, this is stock! It came with that V8 in it! That "R" on my tires stands for "really old" not radial! Blue gas? We thought it was a pretty color! What wire hooked to my throttle?
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