Cloning is a process that involves creating a genetically identical copy of an organism or a part of an organism. Cloned passenger DNA refers to the DNA sequences carried by a cloned organism. Identical passenger DNA sequences can be found in multiple clones of the same organism, making them useful tools for research and genetic engineering. Synonyms for cloned passenger DNA include replicated genetic material, duplicated genetic information, and copied DNA sequences. These terms all describe the same concept; the creation of a genetically identical copy of a segment of DNA. Researchers use these clones to study genetic processes and develop new treatments for genetic disorders.