Johannsen, Wilhelm Ludvig
Johannsen, Wilhelm Ludvig
biographical name(born Feb. 3, 1857, Copenhagen, Den.—died Nov. 11, 1927, Copenhagen) Danish botanist and geneticist. He supported Hugo de Vries's discovery that variation in genotype can occur by mutation; the new character, while independent of natural selection in its initial occurrence, is then subject to natural selection. Johannsen's Elements of Heredity (1909) became an influential text, and his terms phenotype and genotype are now a part of the language of genetics.
This entry comes from Encyclopædia Britannica Concise.
For the full entry on Johannsen, Wilhelm Ludvig, visit Britannica.com.
Seen & Heard 
What made you look up Johannsen, Wilhelm Ludvig? Please tell us what you were reading, watching or discussing that led you here.
