Cloning is the replication of an exact genetic copy of an organism by use of a somatic tissue (or cell) from the donor organism.

To arrive at these conclusions, researchers analyzed about 500,000 cancer mutation records from the Catalog of Somatic Mutations in cancer database and then divided the data into 45 tissue types.

In somatic culture, sucrose has been a standard carbon source, however other kinds of sugar such as glucose, maltose and sorbitol have a certain influence on in vitro tissue culture.