Segmented genomes in negative-strand RNA viruses may have evolved from unsegmented ones; they may have been created by the reduction of redundant genetic regions.

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Segmented genomes in negative-strand RNA viruses have been hypothesized to have arisen from their unsegmented counterparts through a process of genome reduction, where redundant genetic regions were lost.

Segmented Genomes in Negative-Strand RNA Viruses May Have Evolved from Unsegmented