Skip to Content
Medical Term:


Pronunciation: non'a-lel'

Definition: Used of genes that are not competitors at the same locus; how independently they will behave depends on whether their loci are linked. At least when first formed (for instance, as a result of unequal crossing-over), two nonalleles may be identical.

© Copyright 2016 Wolters Kluwer. All Rights Reserved. Review Date: Sep 19, 2016.