Drift among populations
with 20 populations each of nine (left) and 50 (right) diploids, all at
p = 0.5. In each case,
among the smaller populations, seven populations have gone to fixation
for one allele, and five has lost the alleles, over 20 geneations. In
contrast, none of the larger populations have fixed or lost an allele.
Text material © 2004 by Steven M. Carr