Keywords: ErrorThreshold1.png Population numbers as a function of Hamming distance d and mutation rate 1-Q The horizontal axis d is the Hamming distance of the molecular sequences from the master sequence The vertical axis is the logarithm of population for any sequence at that distance divided by total population thus the division of n<sub>d</sub> by the binomial coefficient The total number of digits per sequence is L 100 and the master sequence has a selective advantage of a 1 05 error threshold |