monohybrid noun & adjective. 
[mɒnǝ(ʊ)'hʌɪbrɪd] E20.[from MONO- + HYBRID.]Genetics. (Designating or pertaining to) a hybrid that is heterozygous with respect to a single gene.
 ■   monohybridism noun (
rare) monohybrid condition 
E20.  [TahlilGaran] English Dictionary ▲