Thomas Hunt Morgan, 1866-1945

  title={Thomas Hunt Morgan, 1866-1945},
  author={Ronald Aylmer Sir Fisher},
  journal={Obituary Notices of Fellows of the Royal Society},
  pages={451 - 466}
  • R. Fisher
  • Published 1 February 1947
  • Obituary Notices of Fellows of the Royal Society
Thomas Hunt Morgan, born 25 September 1866 at Lexington, Kentucky, was the elder son of Charlton Hunt Morgan of that State. His mother, Ellen Key Howard, was from Baltimore. There were two younger children in the family, of whom his sister Ellen survives him. From the University of Kentucky, Morgan graduated B.S. 1886 and proceeded to postgraduate work in the same University, later removing to Johns Hopkins University, Baltimore, where he took his Ph.D. in 1890. From that date his academic… 
3 Citations
Thomas Hunt Morgan and the invisible gene: the right tool for the job
The paper analyzes the early theory building process of Thomas Hunt Morgan from the 1910s to the 1930s and the introduction of the invisible gene as a main explanatory unit of heredity and the continuity of the questions to be addressed by both embryology and genetics.
Regeneration: Thomas Hunt Morgan’s Window into Development
  • M. Sunderland
  • Biology, Medicine
    Journal of the history of biology
  • 2010
Although famous for his work with fruit fly genetics, studying Regeneration illuminates Morgan’s earlier scientific approach which emphasized the importance of studying a diversity of organisms.
DNA Is the Genetic Material
The concept of the gene is discussed from Gregor Mendel to Thomas Morgan to Oswald Avery, who discovered that DNA was the genetic material and the active substance in the transformation of type R into type S was DNA.


Castration of hen-feathered Campines
It is evident that removal of the testes in this race produces the same effects as is produced in the hen feathered Sebrights, as reported three years ago before this Society.
A dominant sex-limited character
It will be seen that the abnormal factor is contained in X, hence sex-limited inheritance, and since the factor for the character is coupled with femaleness it may be assumed to be contained in the X-chromosome.
Experiments bearing on the nature of the karyokinetic figure
In the three following ways the results of centrifuging the egg of Cerebratulus throw light on the nature of the karyokinetic figure, there is no evidence that these granules replace the fibers, and this does not prove the center of the force hypothesis.
The Mechanism of Heredity.
II. Linkage and Crossing-over MENDEL'S second law has been found to be restricted in its application. Two pairs of characters do not always assort independently. This fact was first observed by
Localization of the Hereditary Material in the Germ Cells.
  • T. Morgan
  • Biology, Medicine
    Proceedings of the National Academy of Sciences of the United States of America
  • 1915
It is proposed to review briefly the further evidence that leads to the conclusion that the chromosomes are the bearers of the hereditary characters and that the known chromosomal behavior suffices as a mechanism to explain Mendel's law.