A 2012 study published by the Skopje Forensics Medicine Institute, titled „Serbs, Croats 'Have Most Similar DNA' in Region,” found that among the populations studied in the Balkans, Serbs and Croats exhibited the closest genetic similarity to Bosniaks.
Dr. Jakovski pointed out that the research represented a very useful scientific project and had nothing to do with daily politics in a region where ethnicity has often been a reason for conflict.
https://balkaninsight.com/2012/01/23/serbs-croats-have-most-similar-dna/
Western Balkan populations are genetically very similar to each other
