Trick or Treating in Forensics-The Challenge of the Saliva Microbiome: A Narrative Review.

Even if monozygotic twins share 100% of their alleles and dizygotic ones only about 50% of their alleles, using the unweighted Unifrac distance, the authors observed that the difference between the microbial communities of each pair of twins was not statistically different, with only a slight trend toward greater similarity among cohabiting monozygotic pairs than dizygotic ones, suggesting a small genetic influence on microbiome composition.

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