Glossary of "Evolution (4th ed.)" by Futuyma & Kirkpatrick (2017)
- A restriction that prevents a lineage from evolving along a particular evolutionary trajectory because genetic variation enabling that trajectory is not available.
- Futuyma, D. J. & Kirkpatrick, M. 2017. Evolution, 4th ed. -xviii + 602 pp. Sinauer Associates, Inc., Sunderland.