Since I last tested Ancestry in 2006, the company has revamped its desktop software program, Family Tree Maker, so the program can synchronize with Web-based data on Ancestry.com.
That is partly because the carrier rate for Tay-Sachs in the Irish population hasn't been scientifically proved, she says, adding that the current U.S. study is expected to provide data on the risk faced by people of Irish ancestry.