Identical twins are naturally occurring clones. Dolly the sheep was the first mammal cloned from an adult. She was produced by a process called nuclear transfer.
Nuclear transfer involves placing the nucleus of a body cell into an egg cell. In Dolly's case, the nucleus [nucleus: The central part of an atom. It contains protons and neutrons, and has most of the mass of the atom. ] came from an udder cell of an adult sheep.
Possible uses of animal cloning include:
However, there are ethical dilemmas concerning human cloning.
Animal cloning raises ethical issues about how far humans should be allowed to interfere in the production of new life. Regulations currently restrict scientific research into human cloning.
Cloning plants is easier than cloning animals. Cloning expensive food crops has been carried out for many years. This causes the public fewer ethical and moral concerns than animal cloning.
Read on if you're taking the higher paper.
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