Glossary of "Evolution (4th ed.)" by Futuyma & Kirkpatrick (2017)
- The generalization that when only one sex manifests sterility or inviability in hybrids between species it is the heterogametic sex (with two different sex chromosomes) that does so.
- Futuyma, D. J. & Kirkpatrick, M. 2017. Evolution, 4th ed. -xviii + 602 pp. Sinauer Associates, Inc., Sunderland.