ASYMMETRICAL INTROGRESSION IN ANIMAL KINGDOM.

Modified from Wirtz [21] and Avise [26]. List of some hybrid species, the mitochondrial DNA of which has been compared with that of the two parental species. This table includes only studies in which at least five hybrids were genotyped (the probability of sampling five individuals with the same type of mtDNA in a population with equal proportions of the two types of mtDNA is 0.064, two-tailed binomial test).