from The American Heritage® Dictionary of the English Language, 4th Edition
- adj. Involving, dependent on, or controlled by a single gene.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Of or pertaining to one single factor.
The presumptions of a genetic basis for discontinuous phenotypic polymorphism and its maintenance by natural selection are clear from the writings of Ford cited above but these principles also can be found together in a single statement: “In view of these considerations it is clear that if any unifactorial character is at all widespread it must be of some [adaptive] value.