The biometrician Karl Pearson used the Shirley poppy to study his ideas of homotyposis, which he defined as “the quantitative degree of resemblance to be found on the average between the like parts of organisms”.
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The rancorous debate between genetics and biometrics, in which the Shirley poppy became embroiled, was only resolved through the work of Ronald Fisher who showed that the two schools of thought were actually compatible.
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