13. Luria and Delbrück’s experiment is usually considered as providing the first evidence for “evolutionary chance” mutations, even though before, in 1934, Yang and White arrived to the same conclusion by observing the distribution of variants in colonies of V. cholerae (Sarkar 1991). For a detailed presentation and a critical discussion of Luria and Delbrück’s fluctuation test, see Sarkar 1991; Sniegowski and Lenski 1995; Taddei 1995; Darden 2006; Merlin 2009.

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