Human chromosome count


Joe Hin Tjio (1919-2001) was born to Chinese parents in Java, then part of the Dutch East Indies, in 1919. After World War II, Tjio did cytogenetic research in the Netherlands, Sweden and Spain. He came to the United States in 1958 and in 1959 joined the staff of the NIH where he spent the balance of his long career.

Based on obituaries of Dr. Tjio by Bart Barnes in The Washington Post (Dec. 4, 2001) and by Wolfgang Saxon in The New York Times (Dec. 7, 2001) and on personal recollections.

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