The idea of mutations was brought forth by:
Gregor Mendel, who worked on Pisum sativum
Hardy Weinberg, who worked on allele frequencies in a population
Charles Darwin, who observed a wide variety of organisms during sea voyages
Hugo de Vries, who worked on evening primrose
Hugo de Vries, based on his work on evening primrose, brought forth the idea of mutations (large differences arising suddenly in a population). He believed that mutation causes evolution and not the minor variations that Darwin talked about. He termed single-step large mutation as 'saltation'.
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