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Topic: Sewall Wright

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In the News (Tue 23 Apr 19)

  Sewall Wright - Wikipedia, the free encyclopedia
Sewall Wright was born to Philip Green and Elizabeth Quincy Sewall Wright in 1889.
Wright also gave a way to visualise the relationship between genotype or phenotype and success in replication called fitness landscapes.He proposed an explanation for stasis whereby he suggested organisms come to occupy adaptive peaks.
Wright believed that the birth of the consciousness, was not due to a mysterious property of increasing complexity, but rather an inherent property, therefore implying these properties were in the most elementary particles.
en.wikipedia.org /wiki/Sewall_Wright   (701 words)

 Sewall Wright: bio and encyclopedia article   (Site not responding. Last check: 2007-10-21)
Sewall Green Wright (December 21, 1889 - March 3, 1988) was one of the primary founders of population genetics (additional info and facts about population genetics) which led to the modern evolutionary synthesis (additional info and facts about modern evolutionary synthesis).
Wright also did extensive breeding experiments with guinea pig (Stout-bodied nearly tailless domesticated cavy; often kept as a pet and widely used in research) s, and appreciated by 1917 that genes controlled the production of enzymes.
Many of his Ph.D. students became important figures in the development of mammal (Any warm-blooded vertebrate having the skin more or less covered with hair; young are born alive except for the small subclass of monotremes and nourished with milk) ian genetics.
www.absoluteastronomy.com /encyclopedia/s/se/sewall_wright.htm   (277 words)

 Sewall Wright: Evolutionary Theorist
Sewall Green Wright was born to Philip Green and Elizabeth Quincy Sewall Wright, residents of Melrose Massachusetts, on December 21, 1889.
Sewall Wright’s untimely death occurred after complications from a fractured pelvis, the result of his slipping on an icy spot during one of his daily long walks.
Philip Wright, Sewall’s father, was a polymath and was on the faculty of tiny Lombard College in Galesburg, Illinois.
www.harvardsquarelibrary.org /unitarians/wright-sewall.html   (3231 words)

 Nat' Academies Press, Biographical Memoirs V.64 (1994)
Biographical Memoirs: Volume 64 SEWALL WRIGHT December 21, 1889-March 3, 1988 BY JAMES F. THE MATHEMATICAL THEORY of evolution and the science of population genetics began with, and for a generation was almost totally dominated by, three men: R. Fisher, J. Haldane, and Sewall Wright.
Wright also developed much of the theory of inbreeding (his coefficient of inbreeding is standard material in elementary textbooks) and the genetics of quantitative traits.
Wright's (1922, 2-4) studies on inbreeding and crossbreeding of guinea pigs, utilizing the accumulated USDA records and data of his own, were masterful.
www.nap.edu /books/0309049784/html/438.html   (4148 words)

 Evolution - A-Z - Wright   (Site not responding. Last check: 2007-10-21)
Sewall Wright (1889 - 1988) was an American geneticist who played a central part in the foundation of the modern synthesis, together with R.A. Fisher and J.B.S Haldane.
Wright attempted a comprehensive, realistic model of evolution, including complex interactions between genes, random effects, selection between and within populations, and migration.
This photograph of Sewall Wright was taken in 1928.
www.blackwellpublishing.com /ridley/a-z/Wright.asp   (125 words)

Unlike his distinguished older brothers, Sewall Wright and Quincy Wright, "Ted" was a doer, not a thinker, an athlete, engineer and administrator who turned away from the academic life of his family to live in the world of business and government until he went to Cornell University as Vice President for Research in 1948.
In the spring of 1951, Wright became Acting President of Cornell and indeed was offered the presidency, but turned it down because he didn't want to spend his time raising money from the rich, one of the chief duties of college presidents.
Wright retired from Cornell in 1960 and from the Aeronautical Laboratory presidency in 1966, but he continued to be active in aviation and community affairs, especially in environmental and conservation problems.
www.harvardsquarelibrary.org /unitarians/wright_t.html   (1639 words)

 Sewall Wright Papers, American Philosophical Society
Sewall Wright ranks among the most influential figures in the field of population genetics during the 20th century, and made important contributions to biostatistics, biometrics, and evolutionary theory.
One of the pioneers of quantitative genetics and evolutionary biology, Sewall Wright was born in Wisconsin on December 21, 1889.
By 1918, Wright had worked out a new statistical approach, path analysis, which now has wide application in sociology, econometrics, and behavioral genetics, and with this new tool, began investigating some fundamental questions in inheritance and population genetics, delving into the relative influence of heredity and the environment in determining the appearance of traits.
www.amphilsoc.org /library/mole/w/wrights.htm   (2387 words)

 Interview with Robert Sloan, paleontologist, by Joe Cain, session 14
Emerson taught an ecology course, and Sewall Wright taught the genetics courses and a course called Evolution, which was essentially an analysis of his mathematical studies of population genetics.
Sewall Wright was a very mild mannered gentleman who would stand there looking hurt and blinking when his students would not come to the obvious conclusions--obvious to him from the analysis that he put on the flboard.
Wright was visibly presenting material and you had to spend all your time writing the equations down together with short sentences describing what equations meant so that you could assemble the logical frequency, the logical structure of his arguments.
www.ucl.ac.uk /sts/cain/projects/sloan/14.htm   (5373 words)

 Active Skim View of: Sewall Wright
Wright's work in population genetics was almost entirely theoretical, but he had an important collaboration with Th.
Wright was quick to say that his philosophical views had little relevance to the day-to-day practice of science, and philosophy hardly ever entered his conversations with biological colleagues.
WRIGHT'S IMPACT Wright made lasting contributions in statistics, mammalian genetics, animal breeding, population genetics, and the theory of evolution.
www.nap.edu /nap-cgi/skimit.cgi?isbn=0309049784&chap=438-470   (905 words)

 Encyclopedia: Sewall Wright   (Site not responding. Last check: 2007-10-21)
A history of the conceptual and empirical origins of the discipline is followed by an examination the work of R. Fisher and Sewall Wright, two key figures in the history of the discipline.
By examining one particular episode in the history of evolutionary biology, I uncover the different ways in which theoretical population geneticists use models, different aims of scientific explanation, and whether and in what sense it is appropriate to say that evolutionary biology is "unified" or provides "unifying" explanations.
Morrison (2000) has recently claimed that while Fisher and Wright gave us a unified mathematical theory, they offered competing explanations of evolution in populations.
www.nationmaster.com /encyclopedia/Sewall-Wright   (346 words)

 Sewall Wright Biography / Biography of Sewall Wright World of Genetics Biography
Wright made significant contributions to the fields of genetics, zoology, biometrics (the use of statistics to analyze biological data) and animal breeding, but is best known for his comprehensive theory of evolution, known as the shifting-balance theory.
Wright's work brought serious statistical analysis to the forefront of biological science and touched off a long-running debate about the nature of animal species development.
Wright, the oldest of three children, was born to Philip Green Wright, a college professor, and Elizabeth Quincy
www.bookrags.com /biography-sewall-wright-wog   (182 words)

 Sewall Wright --  Encyclopædia Britannica
Wright was educated at Lombard College, Galesburg, Ill., and at the University of Illinois, Urbana, and, after earning his doctorate in zoology at Harvard University (Sc.D., 1915), he worked as a senior animal husbandman…
The American social reformer Frances Wright was born in Dundee, Scotland, on Sept. 6, 1795.
Often deemed an experimental poet, Charles Wright abandoned the conventional formalities of unity and closure and weaved together diverse themes in a supple, ruminative structure.
www.britannica.com /eb/article-9077564   (737 words)

 [No title]   (Site not responding. Last check: 2007-10-21)
So it was easy for Wright to envisage non-adaptive processes as probably widespread in nature, and this was very convenient for him, since it permitted the elaboration of a theory which generated an evolutionary engine with the desired properties of efficiency and speed.
Wright was not a developmental biologist, but a geneticist with experience in sampling error phenomena, so it is perhaps no surprise that he seized on drift as his answer.
The arguments between Wright and Fisher and their colleagues over the relative importance of drift in natural populations were extremely stimulating of research activity; in this respect at least then, this argument differed dramatically from the preceding Grand Evolutionary Debate, that over Gradualism and Saltationism.
instruct.uwo.ca /zoology/441a/hist4.html   (2625 words)

Sewall explained that in extending the invitations to nominees each would be informed that it was voted by the Committee of Arrangements in London that no one should be announced on the Quinquennial programme who did not expect to be present and give her paper or address in person.
Sewall called attention to the number present, saying that although only six weeks had elapsed since the date of the meeting was decided, the presence of thirty-three of the possible fifty-six voting members coming from such distances in the inclement weather indicated unprecedented interest.
Sewall, as a committee on distribution of literature, be requested to continue the good work of distributing Council literature; that this literature shall be limited to the reports of the International Council (held in Washington in 1888), the History and Minutes, and Reports of Executives and Triennials of the National Council.
lcweb2.loc.gov /rbc/rbnawsa/n8354/n8354.old   (16536 words)

 PhilSci Archive - The Heuristic Role of Sewall Wright's 1932 Adaptive Landscape Diagram
Sewall Wright’s adaptive landscape is the most influential heuristic in evolutionary biology.
Wright’s biographer, Provine, criticized Wright’s adaptive landscape, claiming that its heuristic value is dubious because of deep flaws.
Ruse claims Provine has not shown Wright’s use of the landscape is flawed, and that, even if it were, it is heuristically valuable.
philsci-archive.pitt.edu /archive/00001746   (152 words)

 Ask Paul about Determining Inbreeding Coefficients   (Site not responding. Last check: 2007-10-21)
In 1921 Sewall Wright proposed an inbreeding coefficient, which he named F after the great statistician and geneticist Ronald Fisher.
It may be worth noting that in finite populations some inbreeding inevitably happens, in proportion to the population size.
Wright and others provide ways to estimate that, but it is not addressed by the inbreeding coefficient.
www.angelfire.com /or/paulrogers/Wrightf.html   (1632 words)

 May Wright Sewall Biography   (Site not responding. Last check: 2007-10-21)
The career of nationally-known educator, suffragette, and peace advocate May Wright Sewall is examined in the biography "But I Do Clamor": May Wright Sewall, A Life, 1844-1920, now available from Guild Press of Indiana.
Sewall also worked tirelessly on behalf of rights for women in the United States--and around the world--during the late nineteenth and early twentieth centuries.
She served as an invaluable ally to such national suffrage leaders as Susan B. Anthony and Elizabeth Cady Stanton, and gave the woman’s movement an international focus through her pioneering involvement with the International Council of Women and the American National Council of Women.
members.iquest.net /~reboomer/sewall.htm   (273 words)

 A Brief History of IV Regression
IV regression had been used prior to Appendix B. Sewall Wright used it in a 1925 analysis of corn and hog cycles that he had undertaken during WWI, but was slow to get in print.
  It is not clear why Sewall Wright used IV in his 1925 paper, but one possibility is that it was easier computationally than inverting the 4x4 matrices that would come up by OLS (the reason being that he set to zero correlations that were nearly zero, so the IV estimating equations had fewer terms).
Our analysis strongly points towards Philip Wright being the author of Appendix B. We also think that there is strong circumstantial and historical evidence that he thought of the idea of IV regression himself, although without additional primary sources we cannot be as sure of this.
ksghome.harvard.edu /~jstock/wrights   (707 words)

To refresh memories about the Shifting Balance theory, Sewall Wright believed that evolution in large, randomly-mating populations would be slow and ineffective.
Wright is represented as believing that species are divided into partly isolated sub-populations, while Fisher is represented as believing that an entire species is a single large randomly-mating population.
Where he dissented from Wright was in doubting that the isolation was usually strict enough, or lasting enough, to be as important as Wright claimed.
www.gnxp.com /MT2/archives/000629.html   (1226 words)

 References for Wright_Sewall   (Site not responding. Last check: 2007-10-21)
J F Crow, Sewall Wright, the Scientist and the Man, Perspectives in Biology and Medicine 2 (1982), 279-94.
J F Crow, Sewall Wright's Place in Twentieth Century Biology, Journal of the History of Biology 23 (1990), 57-89.
Obituary : Sewall Wright 1889 - 1988, Biometrics 46 (1) (1990), 277-279.
www-groups.dcs.st-and.ac.uk /history/References/Wright_Sewall.html   (147 words)

 Dr. Dan Woolman   (Site not responding. Last check: 2007-10-21)
From this basis, Fisher, Sewall Wright and J. Haldane founded the field of population genetics.
Population genetics is a field of biology that attempts to measure and explain the levels of genetic variation in populations.
Wright extended his results of one-locus models to a two-locus case in proposing the adaptive landscape.
www.observations.org /PersonalPages/ISO/ISOevo4.html   (783 words)

May Wright Sewall (1844-1920), feminist, educator, and lecturer, was born in Milwaukee, the daughter of Philander W. Wright, a teacher, and Mary W. Wright.
Sewall was a charter member of the Art Association of Indianapolis, the Propylaeum, and the Contemporary Club.
This collection, consisting of one bound volume, is a typescript of May Wright Sewall, Avowed Feminist, by Hester Anne Hale, copyright 1992.
indianahistory.org /library/manuscripts/collection_guides/bv2638.html   (554 words)

 Sewall Wright Symposium 1996   (Site not responding. Last check: 2007-10-21)
The first Sewall Wright Symposium was held 29 April to 1 May at the University of Wisconsin-Madison.
Sewall Wright Institute of Quantitative Biology and Evolution (
Cornell University Professor William B. Provine is well known as the author of Sewall Wright's biography and editor of his collected papers.
www.stat.wisc.edu /~newton/wright.symp/1996.html   (325 words)

 The Debate over Dominance
Sewall Wright responded that the selective force acting on any gene modifying dominance must be extremely weak and would be overwhelmed by other factors.
Wright suggested that many gene products may act as catalysts, and that these would naturally exhibit dominance.
Models of Wright's theory suggest that mutations of small effect should behave nearly additively, while mutations of large effect will tend to be recessive.
www.zoology.ubc.ca /~otto/Talks/Dominance/Dominance.html   (1447 words)

 KLI Theory Lab - Authors - Sewall Wright
Wright, S. Evolution and the Genetics of Populations.
Wright, S. Comments on the preliminary working papers of Eden and Waddington.
Wright, S. Tempo and mode in evolution: A critical review.
www.kli.ac.at /theorylab/AuthPage/W/WrightS.html   (64 words)

 Sewall_Wright_and_Evolutionary_Biology_(Science_and_Its_Conceptual_Foundations_series)   (Site not responding. Last check: 2007-10-21)
This is a superb history both of Sewall Wright and of the emergence of the neo-Darwinian synthesis, although, being an intellectual biography of Wright, it is not a complete picture of the development of that synthesis.
That the 'synthesis' was really a two or three headed beast, and that Fisher and Wright had a falling out and produced different versions of basic theory is not always obvious from the slick texts on population genetics now promoting what seems like a finished subject.
Quite apart from anything else, Wright insisted on the complex interactions of gene complexes, and yet his and Fisher's work proceeds with the standard (over-)simplifications of very restricted subsets and loci.
www.sammamishmall.com /products/info/0226684733   (548 words)

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