Epistasis and functional genomics
Epistasis and functional genomics is the study of how genetic interactions, where one gene affects the expression of another gene, can be systematically analyzed to elucidate gene function and understand complex genetic pathways. Epistasis refers to genetic interactions in which the mutation of one gene masks the phenotypic effects of a mutation at another locus.
Source: Wikipedia — Epistasis and functional genomics (CC BY-SA 4.0)