The mechanisms of reproductive isolation or hybridization barriers are a collection of mechanisms, behaviors and physiological processes that prevent the members of two different species that cross or mate from producing offspring, or which ensure that any offspring that may be produced are sterile. These barriers maintain the integrity of a speci... Found on http://en.wikipedia.org/wiki/Reproductive_isolation
(from the article `evolution`) Among sexual organisms, individuals that are able to interbreed belong to the same species. The biological properties of organisms that prevent ... Found on http://www.britannica.com/eb/a-z/r/35
The situation where two populations are prevented or restricted from interbreeding by isolating mechanisms.
Found on http://www.encyclo.co.uk/local/20206
Two populations or individuals of opposite sex are considered reproductively isolated from one another if they cannot together produce fertile offspring. See prezygotic isolation and postzygotic isolation. Found on http://www.fossilmall.com/Science/Glossary.htm