Biology Stack Exchange is a question and answer site for biology researchers, academics, and students. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

My course book says about reproductive isolation that it does not allow the interbreeding among the individuals of different species. It also says that it is a cause of evolution.

How is this cause of evolution?

share|improve this question
could you quote what the book says and tell us what book that is? – rg255 Apr 12 '13 at 8:04

Reproductive isolation isn't exactly a cause of evolution, but rather a cause of speciation. Reproductive isolation allows for two cohorts of one species to be reproductively separated. In this case, evolution via random mutation or mechanisms like genetic drift allows for the differentiation of the two groups, up to the point that the two cohorts and their respective gene pools have evolved to be completely different species.

Truly defining a species is still debatable (via the Biological species definition, Morphological, etc) but reproductive isolation is definitely a mechanism involved in speciation.

share|improve this answer

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.