Dictionary of Human Evolution and Biology

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Macroevolution

1. genetic change sufficient to form new species.

2. evolution on a scale above the species level.

3. a large amount of change or a significant number of evolutionary steps, which may, however, consist of only minor alterations in allele frequencies, chromosome structure, or chromosome numbers, but with large phenotypic effects.

4. (of proteins) process of major, rapid evolutionary change in which new adaptive functions are brought about by intense selective pressure. Aka one-step speciation, saltation.

Cf. microevolution.

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