Module 5　Cloning

　　【美文阅读】

　　The term cloning describes a number of different processes that can be used to produce genetically identical copies of a biological entity(实体；实际存在物). The copied material, which has the same genetic makeup as the original, is referred to as a clone.

Researchers have cloned a wide range of biological materials, including genes,_cells,_tissues and even entire organisms, such as a sheep.