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Hermann Henking : ウィキペディア英語版 | Hermann Henking Hermann Henking (1858 - 1942)〔James Wynbrandt, Mark D. Ludman, ''The Encyclopedia of Genetic Disorders and Birth Defects'', page 395, Infobase Publishing, 2009 ISBN 1438120958.〕 was a cytologist who discovered the X chromosome in 1890 or 1891. The work was the result of a study in Leipzig of the testicles of the firebug (''Pyrrhocoris'') during which Henking noticed that one chromosome did not take part in meiosis. He named this ''X element'' because its strange behaviour made him unsure whether it was genuinely a chromosome.〔James Schwartz, ''In Pursuit of the Gene: From Darwin to DNA'', pages 155-158, Harvard University Press, 2009 ISBN 0674034910〕 It later became X chromosome after it was established that it was indeed a chromosome.〔David Bainbridge, ''The X in Sex: How the X Chromosome Controls Our Lives'', pages 3-5, Harvard University Press, 2003 ISBN 0674016211.〕 ==References==
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