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 - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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