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Charles Elmer Allen (October 4, 1872 in
Horicon, Wisconsin Horicon is a city in Dodge County, Wisconsin, United States. The population was 3,655 at the 2010 census. Geography Horicon is located at (43.4482, -88.6329). According to the United States Census Bureau, the city has a total area of , of which ...
– June 25, 1954) was an American botanist and cell biologist whose discoveries include the first documentation of
sex chromosome A sex chromosome (also referred to as an allosome, heterotypical chromosome, gonosome, heterochromosome, or idiochromosome) is a chromosome that differs from an ordinary autosome in form, size, and behavior. The human sex chromosomes, a typical ...
s in plants. He was a member of the
United States National Academy of Sciences The National Academy of Sciences (NAS) is a United States nonprofit, non-governmental organization. NAS is part of the National Academies of Sciences, Engineering, and Medicine, along with the National Academy of Engineering (NAE) and the Nati ...
and the
American Philosophical Society The American Philosophical Society (APS), founded in 1743 in Philadelphia, is a scholarly organization that promotes knowledge in the sciences and humanities through research, professional meetings, publications, library resources, and communit ...
, and held presidencies of the Botanical Society of America (1921), the Wisconsin Academy of Sciences, Arts and Letters (1931-1933), the
American Society of Naturalists The American Society of Naturalists was founded in 1883 and is one of the oldest professional societies dedicated to the biological sciences in North America. The purpose of the Society is "to advance and diffuse knowledge of organic evolution and o ...
(1936), and the American Microscopical Society (1948). Allen was a professor at the
University of Wisconsin A university () is an institution of higher (or tertiary) education and research which awards academic degrees in several academic disciplines. Universities typically offer both undergraduate and postgraduate programs. In the United States, ...
for over 20 years.


References

1872 births 1954 deaths American botanists Cell biologists American bryologists Members of the United States National Academy of Sciences University of Wisconsin–Madison faculty People from Horicon, Wisconsin Members of the American Philosophical Society {{US-botanist-stub