FIGURE LEGEND
Figure 1. An illustration of rapid evolution of divergent mitochondrial
genotypes between allopatric daughter populations via genetic
hitchhiking. Blue rings represent the mitochondrial genome of an
individual in a population. Yellow dots represent functionally neutral
changes to the nucleotide sequence. Green bars represent functional
changes that bestow a benefit and that are subject to positive
selection. Selection on the beneficial alleles leads to the fixation of
those beneficial alleles along with any neutral traits that happen to be
linked to them while at the same time purging the population of genetic
variants.