Almost no French king is more famous than Louis XVI, reigning during the turbulent times of the French Revolution at the tail-end of the eighteenth century. Previous studies have attempted to characterise his Y-chromosomal single tandem repeat (STR) profile, but were ultimately unsuccessful due to contradictions. So, today, let's explore a 2016 study which analysed a loyalist-owned lock of hair and compared it to three living male-line relatives.

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