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Lucien Cuénot
Lucien Claude Marie Julien Cuénot (; 1866–1951) was a French biologist. In the first half of the 20th century, Mendelism was not a popular subject among French biologists. Cuénot defied popular opinion and shirked the “pseudo-sciences” as he called them. Upon the rediscovery of Mendel's work by Correns, De Vries, and Tschermak, Cuénot proved that Mendelism applied to animals as well as plants.〔Cuénot L. La loi de Mendel et l'hérédité de la pigmentation chez les souris.Arch. Zool. Exp. Gen. Ser. 3, vol 10, pages xxvii-xxx. (1902).〕
==Cuénot's experiments==
Cuénot spent two years working on mice and came to the conclusion that three “mnemons” (genes) are responsible for the production of one “chromogen” or pigment and two “distases” enzymes. The pigment (if present) is acted upon by the enzymes to produce black or yellow colour. If no pigment is present the result is an albino mouse. Cuénot studied the offspring of various crosses between mice and concluded that these “mnemons” or genes were inherited in a Mendelian fashion.〔Cuénot L. L'hérédité de la pigmentation chez les souris. Arch. Zool. Exp. Gén. Ser. 4, vol 1, pages xxxiii-xli. (1903)〕
Subsequently, Cuénot was the first person to describe multiple allelism at a genetic locus.
He also described a lethal mutation in the mouse agouti locus at a time when such a mutation was unheard of.〔Cuénot L. Les races pures et leurs combinaisons chez les souris. Arch. Zool. Exp. Gén. Ser. 4, vol 3, pages cxxiii-cxxxii. (1905)〕
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