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[Kim Woo-jae's Ordinary Scientist] Joe Hin Tjio, Chromosomes, and McCarthyism
Joe Hin Tjio
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2026-07-24
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Who is this?
Joe Hin Tjio (; 2 November 1919 – 27 November 2001), was an Indonesian-born American cytogeneticist. He was renowned as the first person to recognize that the normal number of human chromosomes is 23. He discovered this on 22 December 1955 at the Institute of Genetics of the University of Lund in Sweden, where he was a visiting scientist.
Career
- 1919Born
- 1974Won honorary doctorate of Claude Bernard University Lyon 1
- 1980Won honorary doctor of the University of Zaragoza
- 2001Passed away
Trivia
- •Place of birth: Java
- •Citizenship: Indonesia
- •Known as: geneticist
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