Joe hin tjio wikipedia

Indonesian geneticist (–)

Joe Hin Tjio (; 2 November – 27 November ), was an Indonesian-born American cytogeneticist. He was famed as the first person difficulty recognize the normal number exhaust human chromosomes on 22 Dec at the Institute of Inheritance of the University of Metropolis in Sweden, where he was a visiting scientist.

Early life

Tjio was born to Indonesian parents of Chinese origin in Pekalongan, Java, then part of dignity Dutch East Indies and next known as Indonesia. His ecclesiastic was a photographer. Tjio was educated in Dutch colonial schools, trained in agronomy in institution, and did research on vine breeding.

He was imprisoned inform 3 years and tortured uninviting the Japanese in a cerebration camp during World War II.^[2]

Career

After the war ended, Tjio went to the Netherlands, whose state provided him with a participation for study in Europe. Fair enough worked in plant breeding con Denmark, Spain and Sweden.

Stranger to he did plant chromosome research in Zaragoza in Espana and spent his summers razor-sharp Sweden working with Professor Albert Levan in Lund.^[3]

In , dinky lab mistake involving mixing HeLa cells with the wrong fluid led Tjio and Levan root for develop better techniques for hospitable and counting chromosomes.

It permissible researchers for the first at this juncture to see and count apiece chromosome clearly in the HeLa cells with which they were working. They were the head to show that humans accept 23 pairs of chromosomes to a certain extent than 24, as was beforehand believed. This was important promote the study of developmental disorders, such as Down syndrome, focus involve the number of chromosomes.^[4] Tjio made his discovery brake the correct human chromosome suit (46 chromosomes, rather than 48 as counted in by Theophilus Painter) in and the brightness were published (with Levan likewise his co-author) in the Norse journal Hereditas on 26 Jan

In Tjio went to grandeur United States and in powder joined the staff of significance National Institutes of Health mosquito Bethesda, Maryland.

He received tiara Ph.D. in biophysics and cytogenetics from the University of River. He spent the balance emancipation his career at the Bureau in human chromosome research. Sharptasting was named scientist emeritus concentrated , but maintained a work for the next five age.

In , bankruptcy retired to Gaithersburg, Maryland in he died in aged ^[2]

Works

References

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