How does reproductive cloning work?
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Asexual reproduction. i think thats the answer you are looking for. if not, sorry.

Reproductive cloning usually employs a technique called somatic cell nuclear transfer. Researchers first take a somatic cell (any cell in the body other than a sperm or egg) from the creature they plan to clone, extract the cell's nucleus, which contains the cell's nuclear DNA, and discard the rest.

I hope I helped :)