Answers to the mystery of what befell the heirs of the last czar of Russia nearly a century ago may rest behind locked laboratory doors in Moscow and New England.

DNA test results to be announced within months on bone fragments found in Russia last year could prove that none of Czar Nicholas II's family escaped execution in the Bolshevik Revolution — not even Anastasia, the teenage princess whose identity various women have claimed over the decades.

Evgeny Rogaev, who heads a genetic research team working in Moscow and at the University of Massachusetts Medical School in Worcester, is not immune to the effect his work could have on how his fellow Russian citizens view that turbulent chapter in their history.