A hybrid zone is properly defined as

Question

Quizplus · Accepted Answer

A hybrid zone is a geographic region in which two ancestral species or sub-species come into contact and interbreed to some degree creating hybrid offspring. If the hybrids are viable and fertile, then a hybrid zone is established. This is the proper definition of a hybrid zone, which is given in option B. Option A is a closely related option but is an incomplete definition, as the overlap of two closely related species' ranges does not necessarily create hybrid offspring. Option C defines an ecotone, which is different from a hybrid zone. Option D refers to a cline, which is a gradual change in a character or trait over a geographic area, not the same as a hybrid zone. Option E is also incorrect as the intermingling of two closely related species would inevitably lead to gene flow.

A Hybrid Zone Is Properly Defined as