1900 – Born on January 25th in Nemirov, Ukraine. Ukrainian-American geneticist and evolutionist whose work had a major influence on 20th-century thought and research on genetics and evolutionary theory.
1912 – Dobzhansky already knew what he wanted to be and later told people that "there was no question that I wanted to become a biologist" and he planned to study nature science in the University of Kiev.
1921 – He completed the requirements for his undergraduate degree, although he never formally received a diploma.
– He took an academic position as an Assistant with the Faculty of Agriculture at the Polytechnic Institute of Kiev.
– He began his acquaintance with modern genetics.
1927 – Dobzhansky had reached a frustrating plateau in his efforts to understand evolution in nature.
– He and his wife arrived in the United States and started to work with Morgan and his group.
1932 – He wrote an article on variation and evolution of lady-beetles for publication in the American Naturalist.
1975 – Died on December 18th in San Jacinto.