Hugo de Vries (1848 - 1935)
Dutch botanist Hugo
de Vries (1848 - 1935) performed plant hybridization
experiments that replicated Gregor Mendel's results, and
obtained 3:1 hybrid ratios in several species of
plants. He confirmed Mendel's principles of Dominant &
Recessive alleles, Segregation, and Independent Assortment. Carl Correns, who
re-discovered Mendel's work at almost exactly the same moment,
felt that de Vries initially had not given Mendel sufficient
credit for his priority. de Vries adjusted his acknowledgement
in subsequent publication.
de
Vries subsequent work on the Evening Primrose
led him to advocate macromutations as a means
of evolution. In fact, the sudden large changes he obtained
were due to the species' peculiar system of chromosome
pairing, and not genetic changes.