Cloning is the process in which are generating a genetically identical copy of a cell or organism. Cloning is always happening around us in nature. When a cell replicates itself asexually, it replicates with no genetic alteration. Cells without a nucleus, like bacteria, replicate they create identical replications using Binary Fission. Cells with a nucleus, like humans, replicate using mitosis. Cloning so far has ben used to replicate animals and plant. As cloning involves, we will be able to replicate humans themselves. Like you would expect, there would be ethical issues. Mainly that once cloning fully evolves, everyone will be the same.