ĚÇĐÄAPP

Carl CorrensCarl Correns, 1910s

Carl Correns (1864 - 1933) 

    German botanist Carl Correns (1864 - 1933) was a student of Karl Nageli, with whom Mendel had corresponded concerning his experiments with peas: Correns was unaware of that work. He obtained numerical results similar to Mendel in several species, including Maize and Pisum, then rediscovered Mendel's papers, and published his work with acknowledgement of Mendel's priority, originality, and interpretations. He received an early paper of Hugo de Vries that failed to acknowledge Mendel. Correns immediately prepared his own report, “G. Mendel’s Law Concerning the Behavior of the Progeny of Varietal Hybrids.” He emphasized that Mendel had already obtained the essential experimental results and supplied their explanation, and observed that de Vries used Mendel’s terms “dominant” and “recessive.” de Vries acknowledged Mendel in a second paper that was submitted before Correns’s response.

    Correns' emphasis on the "scientific romance" of Mendel's rediscovery after 30 years helped secure "Mendelism" its proper recognition. His later research took him to Berlin-Dahlem, where he became a founding Director of the Kaiser Wilhelm Institute for Biology. His experiments with variegated four-o’clock plants, Mirabilis jalapa, helped establish the existence of maternal, cytoplasmic inheritance, and showed that heredity encompassed additional mechanisms requiring experimental explanation.
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Text material © 2026 by Steven M. Carr