This paper reviews the functions, mechanisms, and types of movable genes called transposons. It is concluded that they play an important role in all living organisms, including antibiotic resistance and increased genetic diversity. This field has exploded in recent years, and indications exist that movable genetic elements are a significant part of the genome both in terms of size and importance. Research has also indicated that all transposons are controlled by a complex genetic mechanism that functions to reduce the likelihood of inappropriate transposon placement. The evidence now indicates transposons are part of a complex designed system that serves the function of producing morphological variety. Furthermore, the transposition mechanism cannot be explained by a step-by-step evolutionary process but must exist as a complete unit in order to function.