Source : Webster's Revised Unabridged Dictionary (1913)

Monogenic \Mon`o*gen"ic\, a.
   1. (Biol.) Of or pertaining to monogenesis.

   2. (Zo["o]l.) Producing only one kind of germs, or young;
      developing only in one way.

Source : WordNet®

monogenic
     adj : of or relating to an inheritable character that is
           controlled by a single pair of genes