Wilhelm Johannsen was a Danish botanist, plant physiologist and geneticist. He was born in Copenhagen. While very young, he was apprenticed to a pharmacist and worked in Denmark and Germany beginning in 1872 until passing his pharmacist's exam in 1879. In 1881, he became assistant in the chemistry department at the Carlsberg Laboratory under the chemist Johan Kjeldahl. Johannsen studied the metabolism of dormancy and germination in seeds, tubers and buds.
| Property | Value |
|---|
| dbpedia-owl:Person/almaMater
| |
| dbpedia-owl:Person/birthDate
| |
| dbpedia-owl:Person/birthPlace
| |
| dbpedia-owl:Person/deathDate
| |
| dbpedia-owl:Person/deathPlace
| |
| dbpedia-owl:Person/individualisedPnd
| |
| dbpedia-owl:Person/knownFor
| |
| dbpedia-owl:almaMater
| |
| dbpedia-owl:birthDate
| |
| dbpedia-owl:birthPlace
| |
| dbpedia-owl:deathDate
| |
| dbpedia-owl:deathPlace
| |
| dbpedia-owl:knownFor
| |
| dbpedia-owl:thumbnail
| |
| dbpprop:abstract
|
- Wilhelm Johannsen was a Danish botanist, plant physiologist and geneticist. He was born in Copenhagen. While very young, he was apprenticed to a pharmacist and worked in Denmark and Germany beginning in 1872 until passing his pharmacist's exam in 1879. In 1881, he became assistant in the chemistry department at the Carlsberg Laboratory under the chemist Johan Kjeldahl. Johannsen studied the metabolism of dormancy and germination in seeds, tubers and buds. He showed that dormancy could be broken by various anesthetic compounds, such as diethyl ether and chloroform. In 1892, he was appointed lecturer at Royal Veterinary and Agricultural University and later became professor of botany and plant physiology. He taught plant physiology. His most well-known research concerned so-called pure lines of the self-fertile common bean. He was able to show that even in populations homozygous for all traits, i.e. without genetic variation, seed size followed a normal distribution. This was attributable to resource provision to the mother plant and to the position of seeds in pods and of pods on the plant. This led him to coin the terms phenotype and genotype. His findings led him to oppose contemporary Darwinists, most notably Francis Galton and Karl Pearson, who held the occurrence of normal distributed trait variation in populations as proof of gradual genetic variation on which selection could act. Only with the modern evolutionary synthesis, was it established that variation needed to be heritable to act as the raw material for selection. The terms phenotype and genotype were created by Wilhelm Johannsen and first used in his paper Om arvelighed i samfund og i rene linier and in his book Arvelighedslærens Elementer. This book was rewritten, enlarged and translated to German as Elemente der exakten Erblichkeitslehre. It was in this book Johannsen introduced the term gene. This term was coined in opposition to the then common pangene that stemmed from Darwin's theory of pangenesis. The book became one of the founding texts of genetics. Also in 1905, Johannsen was appointed professor of plant physiology at the University of Copenhagen, becoming vicechancelor in 1917. In December 1910, Johannsen was invited to give an address before the American Society of Naturalists. This talk was printed in the American Naturalist. In 1911, he was invited to give a series of four lectures at Columbia University
- Wilhelm Ludvig Johannsen war ein dänischer Botaniker und Genetiker. Er prägte den Begriff „Gen“ als Träger der Vererbung.
- Wilhelm Ludvig Johannsen est un botaniste danois, né 3 février 1857 à Copenhague et mort le 11 novembre 1927 dans cette même ville. Il travaille pour l'Institut agricole de Copenhague avant d'enseigner l'agriculture à l'université de la ville. En 1909, il invente le terme de gène (à partir du grec qui donne la naissance à). Il conçoit également les termes de "génotype" et de "phénotype" en 1911.
- Fájl:Wilhelm Johannsen 1857-1927. jpg Wilhelm Ludvig JohannsenWilhelm Ludvig Johannsen dán botanikus. 1909-ben ő alkotta meg a gén szót, amely a görög életet adni kifejezésből származik. Mielőtt a Koppenhágai Egyetemen az agrártudományok professzora lett, a koppenhágai Agrártudományi Intézetben dolgozott. 1909-ben ugyancsak ő alkotta meg a fenotípus és a genotípus szavakat.
- Nacque e visse a Copenaghen dove lavorò per l'Istituto di agricoltura, prima di diventare professore presso l'Università di Copenaghen Nel 1911 coniò i termini di genotipo e fenotipo per indicare l'unità ereditaria di cui si compongono i cromosomi, ossia quelle strutture a filamento od a bastoncino che sono contenute nel nucleo cellulare. Ogni cromosoma è formato da un gran numero di geni costituiti da molecole di DNA (acido desossiribonucleico). Ciascun gene controlla uno o più caratteri ereditari, ed a formare un carattere ereditario possono concorrere uno o più geni.
- Wilhelm Ludvig Johannsen var en dansk botaniker, som oppfant begrepet gen i 1909. Bror til Helene Johannsen.
- Wilhelm Ludvig Johannsen - duński botanik, który w roku 1909 stworzył pojęcie genu. Od 1905 profesor fizjologii roślin na uniwersytecie w Kopenhadze. Wykazał, że selekcja w obrębie czystych linii jest nieskuteczna.
- Wilhelm Ludvig Johannsen foi um botânico dinamarquês, fisiologista vegetal e geneticista. Em 1909 criou o termo gene. Também desenvolveu a Teoria das Linhas Puras, observando que a seleção só era efetiva quando baseada em diferenças genéticas, e não ambientais.
- Wilhelm Ludvig Johannsen a fost botanist danez, el a inventat cuvântul "genă" în 1909.
|
| dbpprop:almaMater
| |
| dbpprop:birthDate
| |
| dbpprop:birthPlace
| |
| dbpprop:deathDate
| |
| dbpprop:deathPlace
| |
| dbpprop:field
| |
| dbpprop:hasPhotoCollection
| |
| dbpprop:knownFor
|
- proving the constancy of the genome
defining gene, genotype and phenotype
|
| dbpprop:name
| |
| dbpprop:reference
| |
| dbpprop:wikiPageUsesTemplate
| |
| dbpprop:wordnet_type
| |
| dbpprop:workInstitution
| |
| rdf:type
| |
| rdfs:comment
|
- Wilhelm Johannsen was a Danish botanist, plant physiologist and geneticist. He was born in Copenhagen. While very young, he was apprenticed to a pharmacist and worked in Denmark and Germany beginning in 1872 until passing his pharmacist's exam in 1879. In 1881, he became assistant in the chemistry department at the Carlsberg Laboratory under the chemist Johan Kjeldahl. Johannsen studied the metabolism of dormancy and germination in seeds, tubers and buds.
- Wilhelm Ludvig Johannsen war ein dänischer Botaniker und Genetiker. Er prägte den Begriff „Gen“ als Träger der Vererbung.
- Wilhelm Ludvig Johannsen est un botaniste danois, né 3 février 1857 à Copenhague et mort le 11 novembre 1927 dans cette même ville. Il travaille pour l'Institut agricole de Copenhague avant d'enseigner l'agriculture à l'université de la ville. En 1909, il invente le terme de gène (à partir du grec qui donne la naissance à). Il conçoit également les termes de "génotype" et de "phénotype" en 1911.
- Fájl:Wilhelm Johannsen 1857-1927. jpg Wilhelm Ludvig JohannsenWilhelm Ludvig Johannsen dán botanikus. 1909-ben ő alkotta meg a gén szót, amely a görög életet adni kifejezésből származik. Mielőtt a Koppenhágai Egyetemen az agrártudományok professzora lett, a koppenhágai Agrártudományi Intézetben dolgozott. 1909-ben ugyancsak ő alkotta meg a fenotípus és a genotípus szavakat.
- Nacque e visse a Copenaghen dove lavorò per l'Istituto di agricoltura, prima di diventare professore presso l'Università di Copenaghen Nel 1911 coniò i termini di genotipo e fenotipo per indicare l'unità ereditaria di cui si compongono i cromosomi, ossia quelle strutture a filamento od a bastoncino che sono contenute nel nucleo cellulare. Ogni cromosoma è formato da un gran numero di geni costituiti da molecole di DNA (acido desossiribonucleico).
- Wilhelm Ludvig Johannsen var en dansk botaniker, som oppfant begrepet gen i 1909. Bror til Helene Johannsen.
- Wilhelm Ludvig Johannsen - duński botanik, który w roku 1909 stworzył pojęcie genu. Od 1905 profesor fizjologii roślin na uniwersytecie w Kopenhadze. Wykazał, że selekcja w obrębie czystych linii jest nieskuteczna.
- Wilhelm Ludvig Johannsen foi um botânico dinamarquês, fisiologista vegetal e geneticista. Em 1909 criou o termo gene. Também desenvolveu a Teoria das Linhas Puras, observando que a seleção só era efetiva quando baseada em diferenças genéticas, e não ambientais.
- Wilhelm Ludvig Johannsen a fost botanist danez, el a inventat cuvântul "genă" în 1909.
|
| rdfs:label
|
- Wilhelm Johannsen
- Wilhelm Johannsen
- Wilhelm Johannsen
- Wilhelm Johannsen
- Wilhelm Ludvig Johannsen
- Wilhelm Johannsen
- Wilhelm Johannsen
- Wilhelm Johannsen
- Wilhelm Johannsen
|
| owl:sameAs
| |
| skos:subject
| |
| foaf:depiction
| |
| foaf:name
| |
| foaf:page
| |
| is dbpedia-owl:Scientist/doctoralStudent
of | |
| is dbpedia-owl:doctoralStudent
of | |
| is dbpprop:doctoralStudents
of | |
| is dbpprop:redirect
of | |
| is owl:sameAs
of | |
![[RDF Data]](/statics/sw-cube.png)
