Extended Data Fig. 2: Standing diversity within population PO-4.

(A) Whole population size distribution (n > 1000) and b picture of PO-4 after 715 days of serial transfers ( ~ 4300 generations). Large-sized snowflake yeast were present at a mean frequency of 9.4% in the whole t715 population (Extended Data Fig. 4). This image is representative of the whole population.