Genetic Drift of rare neutral alleles in multiple populations
(N = 50, q0 = 0.05; W0 = W1 = W2 = 1)
In each of 100 populations, N
= 50 so there are 2N = 100 alleles, with initial
f(B) = q0 = 0.05.
A majority of population replicates go to loss (q =
0) before 50 generations: five go to fixation (q = 1)
within 300 generations. This is consistent with the
expectation that, in the absence of selection, for any
population with f(B) = q0
, the expectation of fixation per population by
genetic drift is also q. Note that in the last population that goes to fixation,
q varies widely over time above and below 0.5.
Figure & Text material © 2021 by Steven M. Carr