Final answer:
Monogenesis in biology refers to the concept that a single species is the origin of multiple species or that a genetic trait is determined by a single genetic locus.
Step-by-step explanation:
Monogenesis is a term used in the context of biology, referring to the idea that something originates from a single source or species. When used to describe genetic inheritance patterns, monogenetic refers to traits determined by a single locus. This is in contrast to oligogenetic inheritance involving a few loci and polygenetic inheritance involving many loci. In an evolutionary context, monogenesis may relate to cladogenesis, where a single species gives rise to multiple new species, branching into distinct lineages.
The concept can also touch upon cultural or historical contexts, portraying a monotheistic belief system or the political science term monarchy, but these are not relevant to the strictly biological definition of monogenesis.