Haplogroup Tree Mutation Mapper
From ISOGG Wiki
The 23andMe Personal Genome Service uses thousands of single-nucleotide polymorphisms (SNPs) to describe hundreds of mitochondrial DNA and Y chromosome haplogroups. This experimental feature will tell which SNPs were used to define a given haplogroup. Just enter a haplogroup's name to retrieve the SNPs that were used to define it. The list begins with the mutation that defines that haplogroup's most recent branch on the mitochondrial or Y chromosome tree and works backward to the root. Because the Haplogroup Tree Mutation Mapper is an experimental feature in 23andMe Labs, it may not work as well or provide as much documentation as other supported features.