Joe Hin Tjio, US / Indonesian cytogeneticist (Java Island 02 November 1919 – Gaithersburg, Maryland 27 November 2001)
Son of Chinese immigrants
ACHIEVEMENTS
First to recognize the correct number of human chromosomes (46)
With A. Levan. The chromosome number of man. Hereditas 42:1-6, 1956
With C.E.Ford & P.E. Jacobs elucidated chromosomal basis of certain genetic abnormalities and sex determination in man (1959)
Discovered chromosome abnormalities in leukemias and developed a method for aspirating bone marrow cells
With J. Whang. Direct chromosome preparation of bone marrow cells. Stain Techn. 37:17-20, 1962
Developed Tjio-Whang acetic orcein squash procedure (1960)