An Interactive Annotated World Bibliography of Printed and Digital Works in the History of Medicine and the Life Sciences from Circa 2000 BCE to 2022 by Fielding H. Garrison (1870-1935), Leslie T. Morton (1907-2004), and Jeremy M. Norman (1945- ) Traditionally Known as “Garrison-Morton”

15858 entries, 13798 authors and 1925 subjects. Updated: February 2, 2023

JOHANNSEN, Wilhelm Ludvig

2 entries
  • 242

Ueber Erblichkeit in Populationen und in reinen Linien.

Jena: Gustav Fischer, 1903.

More support for the Mendelian law of inheritance was provided by Johannsen, a Danish botanist, who showed that in certain self-fertilizing plants a pure line of descendants can be maintained indefinitely, in which case natural selection is not effective, selection depending upon genetic variability. He introduced the term “gene” in 1909.

  • 6844

Elemente der exacten Erblichkeitslehre.

Jena: Gustav Fischer, 1909.

In this work Johannsen coined the term “gene” as the “underlying structure in the organism, that which was transmitted during hybridzation.” He also coined the term "phenotype" to express what is actually observed and can be measured, in contrast to "genotype" that he coined “to express the underlying constitution of the organism from which development of the organism begins" (Brock).