A new DNA testing site with backing from Google <google.com> purports to "help you understand your DNA." It's called 23andMe <23andme.com>, a reference to the 23 pairs chromosomes making up your genome.

The site's $999 test examines your mtDNA and your autosomal DNA (everything but the X or Y chromosome) for genetic variations called SNPs (pronounced "snips"). You have about 500,000 SNPs linked to everything from your heart attack risk to whether you like Brussels sprouts.