Gregor Mendel & Scientific Fraud: iHPS Workshop, University of Durham (Part 2 of 2)


On the second day of the iHPS workshop at the University of Durham, Professor Greg Radick (University of Leeds) delivered his keynote address “Is Mendel’s Evidence “Too Good to Be True”? This year has seen the one hundred and fiftieth anniversary of Mendel’s two 1865 lectures “Experiments in Plant Hybridisation,” with many drawing a line directly from Mendel’s findings to modern biotechnology. Yet two ghosts exist at the Mendelian feast: the specter of eugenics and the accusation that Mendel fraudulently obtained data. Or as Ronald Fisher termed it, that Mendel’s results were “too good to be true.”

Mendel’s 1865 findings are known to many of us. Hybridising garden peas in his monastery garden revealed a reoccurring pattern of three-to-one in second-generation hybrids. In later generations, traits reversed, with gametes receiving heredity information randomly. If we flip a coin multiple times and always end up with an exact fifty-fifty split, eyebrows would be raised. In a 1902 paper by W.F.R. Weldon, statistical analysis of Mendel’s data revealed such a trend, as the latter’s result accorded remarkably with his hypothesis. The chances of Mendel arriving at his results by pure coincidence was placed by Weldon at sixteen-to-one. In 1911, Ronald Fisher spoke at the Cambridge University Eugenics Society on Weldon’s findings. By this time, Mendelian genetics has been established beyond controversy and integrated with Darwinian natural selection. At this talk and in a later 1936 paper, Fisher declared that Mendel regarded his experiments as an empirical demonstration of his conclusions. Mendel was no mere experimentalist – though his results were still fake. Fisher laid the blame at the feet of one of Mendel’s assistants, who had doctored experimental results to please his master.


Drawing upon affair, Professor Radick noted that Mendel’s peas were not intended to be “true-to-nature,” but represented absolute qualities. For historians of science, the episode suggests that a more thoughtful, systematic approach to scientific fraud is needed. We should also be aware of different approaches to genetics offered by historical figures such as Weldon, who emphasised the interaction of genes with each and other and the environment. In fact, recent results from Leeds HPS Genetic Pedagogies Project suggest that students placed on a Weldonian-style genetics course emerge less convinced of genetic determinism than their Mendelian peers.

Field & Laboratory – Darwin in the Ottoman Empire – Chinese Biology & Goldfish

Other associates of Leeds HPS also presented well received papers on the history of biology. Cultivating Innovations ( postdoc Dominic Berry (@HPSGlonk) spoke on the historical division of field and laboratory, drawing upon randomised control trials at the National Institute of Agricultural Botany (NIAB). Visiting fellow Alper Bilgili (@BilgiliEnglish) described the reception of Darwinism in the Ottoman Empire. Darwin was enthusiastically embraced by some westward-leaning Turkish intellectuals who greatly admired the scientific method – while others sought to integrate Darwinism with traditional religious beliefs. Lijing Jiang (@LijingJiang), who (all too briefly) visited Leeds for some weeks, spoke on Chinese biologists’ investigations into genetics and evolution from the early-twentieth century. In contrast to the experimental cultures of many Western universities, Chinese biologists who studied native goldfish drew upon historical accounts to reconstruct the animals’ evolutionary past.


One thought on “Gregor Mendel & Scientific Fraud: iHPS Workshop, University of Durham (Part 2 of 2)

  1. Nice blog. According to Fairbanks and Rytting (2001) Mendel had done more crossing experiments and he reported only the ones with the best fit in his two presentations – the paper is the text that was read at the two meetings, no time for more numbers. Often the simplest explanation is the best. Actually it is the 150 years celebration not 50 years.

    Fairbanks, D.J., Rytting, B. (2001). Mendelian Controversies: A Botanical and Historical Review. American Journal of Botany, 88(5). Retrieved from 737-752.

    Liked by 1 person

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