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saltatory evolution

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saltatory evolution
n.
The theory that the evolution of a new species from an older one may occur as a large jump, such as a major repatterning of chromosomes, rather than by gradual accumulation of small steps or mutations.
saltatory evolution,
the appearance of a sudden change within a species, caused by mutation. The progression of a species by sudden major changes rather than by the gradual accumulation of minor changes. The phenomenon occurs predominantly in plants as a result of polyploidy. See also emergent evolution.


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