“The mutation of bacteria and viruses are merely hereditary fluctuations around a median position; a swing to the right, a swing to the left, but no final evolutionary effect.”

— Pierre-Paul Grassé

Pierre Paul Grassé¨(1973). L'évolution du vivant: matériaux pour une nouvelle théorie transformiste. A. Michel,. p. 151
Evolution of living organisms: evidence for a new theory of transformation (1977)
Original: En somme, les mutations des Bactéries et des virus ne sont que des fluctuations héréditaires, autour d'une position moyenne, oscillation à droite, oscillation à gauche: effet évolutif final nul.

Adopted from Wikiquote. Last update June 3, 2021. History

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Pierre-Paul Grassé12

French zoologist 1895–1985

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http://www.trumpetherald.com/forum/viewtopic.php?t=36024
Attributed

“The mutation of bacteria and viruses are merely hereditary fluctuations around a median position; a swing to the right, a swing to the left, but no final evolutionary effect.”

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Pierre-Paul Grassé12

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