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Speciation, the formation of new and distinct species in the course of evolution. Speciation involves the splitting of a single evolutionary lineage into two or more genetically independent lineages.
Sympatric speciation. Definition. noun. A speciation in which new species evolve from a single ancestral species while inhabiting the same geographic region. Supplement. Sympatric speciation is more common in plants. For instance, parent plants produce offspring that are polyploid.Hence, the offspring live in the same environment as their parents but are reproductively isolated.ympatric speciation is more common in plants. For instance, parent plants produce offspring that are polyploid. Hence, the offspring live in the same environment as their parents but are reproductively isolated.