genetic change  The topic genetic change is discussed in the
following articles:     • TITLE: evolution (scientific theory)
SECTION: Genetic differentiation during speciation     Genetic
changes underlie all evolutionary processes. In order to
understand speciation and its role in evolution, it is useful to
know how much genetic change takes place during the course of
species development. It is of considerable significance to
ascertain whether new species arise by altering only a few genes
or whether the process requires drastic changes—a genetic...