However, when it comes to evolutionary theory, far more gaps are accepted than are typical for other scientific theories. There is another reason why Dr. Behe's ideas should not be equated to the God of the gaps idea. In the past, the gaps were generally due to lack of information about certain natural processes. In contrast, Dr. Behe's ideas involve processes where we do have information. That information, though not complete, is sufficient to indicate problems with postulating completely naturalistic explanations.
Gene duplication provides the complexity.
According to this idea, an organism produces a copy of a gene it already has. The original gene keeps the original system running, while the newly copied gene evolves to eventually improve the system. This process is repeated often until there develops a complicated system involving many genes. For example, in today's human being, blood clotting, an example used in Behe's book, is a very complicated process. However, this process uses many genes, which have similarities in part of their structure.