Joe Hin Tjio (1919-2001) was an Indonesian-born American cytogeneticist who determined in 1955, in work published the following year, that the normal number of human chromosomes is forty-six rather than the forty-eight previously believed. This finding proved crucial to understanding developmental disorders caused by chromosomal abnormalities, including Down syndrome.
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Death PlaceGaithersburg, United States 1 Field
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1. Joe Hin Tjio (Wikidata)
P570 (date of death): year
+2001-11-27T00:00:00Z
P570 (date of death): full date
+2001-11-27T00:00:00Z
P27 (country of citizenship): Indonesia
Q252
P20 (place of death): Gaithersburg, United States
Q752719
P19 (place of birth): Java, Indonesia
Q3757
View the Source2. Joe Hin Tjio (Wikipedia)
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He was renowned as the first person to recognize that the normal number of human chromosomes is 46, 23 pairs.
Member Of: Lund University, Lead
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.
Works In: Genetics, Lead, sentence 1
Joe Hin Tjio (; 2 November 1919-27 November 2001), was an Indonesian-born American cytogeneticist.
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