Schematic illustration of the impact of the different modes of inheritance of nuclear and mitochondrial DNA on the ability to detect admixture between a hypothetical red and a blue species. A Nuclear DNA is inherited biparentally and reflects admixture in hybridization. In this case, the nuclear markers of the F2 offspring will reflect a genome originating to 75% from the red species. B Mitochondrial DNA is inherited matrilineally only. Therefore, the information on lines of descent involving male ancestors (indicated by dashed outlines) is lost from the mitogenome of the offspring. The mtDNA of the F2 offspring will reflect the matrilineal ancestry of the blue species only, without any indication of the 75% admixture from the red species.