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Thomas Morgan's Birth
At Lexington, Kentucky, U.S.A -
Morgan's Childhood
At the age of ten, he showed an immense interest in natural history. He collected birds, birds' eggs, and fossils, -
Morgan's Education
He was educated at the University of Kentucky, where he took his B.S. degree in 1886, and doing postgraduate work at Johns Hopkins University, where he studied morphology and physiology. -
Morgan and the Seashore Laboratory
The year after his graduation, he spent some time at the seashore laboratory of Alphaeus Hyatt at Annisquam, Mass. -
Morgan's Research at Woods Hole
He was engaged in research for the United States Fish Commission at Woods Hole -
Sewall Wright's Birth
Born in Melrose, MA -
Morgan's Degree and Bruce Fellowship Award
He spent the summer at the Marine Biological Laboratory in Woods Hole, He also obtained his Ph.D. degree at Johns Hopkins University and in thr same year he was awarded the Adam Bruce Fellowship. -
Morgan Becomes a Professor
He became Associate Professor of Biology at Bryn Mawr College for Women in 1891. -
Morgan's visit to Naples
He worked at the Marine Zoological Laboratory in Naples which he visited in 1895 and also in 1900. Where he met Hans Driesch and Curt Herbst. The influence of Driesch turned his mind in the direction of experimental embryology. -
Morgan becomes Professor of Experimental Zoology
He became Professor of Experimental Zoology at Columbia University, New York -
Morgan challenges the assumption
He challenged the assumption then current that the germ cells are pure and uncrossed and was sceptical that species arise by natural selection. -
Morgan began work on the fruitfly
He began the work on the fruitfly Drosophila melanogaster. He wrote papers that dealt with the demonstration of sex linkage of the gene for white eyes in the fly, the male fly being heterogametic. His work also showed that very large populations of Drosophila could be bred. -
Morgan publishes his book 'Mechanism of Mendelian Heredity'
He wrote a book on the linear arrangement of the genes in the chromosomes -
Wright becomes a professor at University of Chicago
Professor of Genetics, University of Chicago (1926-55) -
Morgan is appointed Professor of Biology
He was appointed Professor of Biology and Director of the G. Kerckhoff Laboratories at the California Institute of Technology, at Pasadena. -
Wright's career at the Department of Agriculture
First decade of his career was spent at the Department of Agriculture where he perfected the inbreeding coefficient, a mathematical algorithm for determining the effect of inbreeding on heterozygosity -
Wright introduced his paper "Evolution in Mendelian Populations"
On his notion of "shifting balance" -
Wright's theory of population subdivision
He thought that many species were subdivided into small populations that exchanged a few migrants with each other but were not completely isolated. -
Wright's theory of population subdivision continued
Population subdivision continued -
Morgan is awarded the Nobel Prize
He was awarded the Nobel Prize for his discoveries concerning the role played by the chromosome in heredity -
Morgan's Death
Thomas H. Morgan died on December 4, 1945 -
Wright becomes a professor at University of Wisconsin
Leon J Cole Professor of Genetics, University of Wisconsin at Madison (1955-60) -
Wright is awarded the Darwin Medal
He is awarded the Darwin Medal (1966) -
Wright wins the National Medal of Science
National Medal of Science (1966) -
Wrights's study of guinea pigs
Throughout his career, Wright made many contributions to the study of the relationship between genotype and phenotype using guinea pigs. Wright showed the importance of considering the effects of combinations of genes rather than the effects of individual genes. -
Wrights's study of guinea pigs continued
Study of guinea pigs continued -
Wright's shifting balance theory
Phase 1: the exploratory phase, is characterized by the action of genetic drift
Phase 2: natural selection
Phase 3: those populations that are at higher fitness peaks send off migrants to the other populations -
Wrights's study of guinea pigs continuned
Study of guinea pigs continued -
Wright's Death
Died in Madison, WI
