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Apr 1, 2014 · Wilhelm Johannsen (1857–1927), a pharmacologist by training, served, without any formal university degree, as assistant in the Chemical Department of the newly founded Carlsberg Laboratorium in Copenhagen. In 1892 he was appointed lecturer and later professor of plant physiology at the Royal Veterinary and Agricultural College of Copenhagen.
Wilhelm Johannsen (3 February 1857 – 11 November 1927) invented the term "gene". He was a Danish pharmacist , botanist , plant physiologist, and geneticist . He is best known for coining the terms gene , phenotype and genotype , and for his 1903 "pure line" experiments in genetics .
Wilhelm Johannsen, a Danish pharmacologist and botanist, coined the word ‘gene' in 1909 after investigating plant seed size. Johannsen used the term to describe the Mendelian units of heredity observed in pure lines of the self-fertile common bean, with seed size following a normal distribution across homozygous and heterozygous populations.
Apr 1, 2014 · As the Danish plant physiologist Wilhelm Johannsen wrote, Darwin’s theory of pangenesis was more or less the same as that which Hippocrates had held 22 centuries earlier [p. 54]. 1 With the cytological discoveries of the late 19th century, and the efforts to give plant and animal breeding a scientific basis, a new era began. Botanists and ...
Add to Google Calendar 11/05/1957 4:10 PM 11/05/1957 6:00 PM America/Los_Angeles Wilhelm Johannsen, the Creator of the Terms Gene, Genotype, Phenotype, and Pure Line University of California, Berkeley - UC Berkeley Campus Berkeley Graduate Lectures [email protected] false MM/DD/YYYY
geneticist Wilhelm Johannsen in the years 1901--1902, and he interpreted it to show that when recombination ("hybridization") and mutuation is excluded heredity is stable. There was no "continuous" change in heredity as claimed by orthodox Darwinists like the members of the British biometric school.
Nov 11, 2008 · This paper describes the historical background and early formation of Wilhelm Johannsen’s distinction between genotype and phenotype. It is argued that contrary to a widely accepted interpretation (For instance, W. Provine, 1971. The Origins of Theoretical Population Genetics. Chicago: The University of Chicago Press; Mayr, 1973; F. B. Churchill, 1974. Journal of the History of Biology 7: 5 ...
