This is nitpicky, but 23andme doesn't do whole genome sequencing. They use a genotyping SNP chip that interrogates about 500k individual bases (and imputes othe

This is nitpicky, but 23andme doesn't do whole genome sequencing. They use a genotyping SNP chip that interrogates about 500k individual bases (and imputes other positions) rather than sequencing the 2x3B base pairs in the whole genome.