Inability of a hybrid to produce viable off spring is termed as

Solution (By Examveda Team)

Inability of a hybrid to produce viable offspring is termed Male sterility, Hybrid sterility as well as Hybrid Fertility.
Plant male sterility refers to the failure in the production of fertile pollen. It occurs spontaneously in natural populations and may be caused by genes encoded in the nuclear (genic male sterility; GMS) or mitochondrial (cytoplasmic male sterility; CMS) genomes.
Male-sterility plants provide crucial breeding tools to harness hybrid vigor, or heterosis, in hybrid crops and also provide important materials to study stamen and pollen development and cytoplasmic-nuclear genomic interactions.