What does it mean when my genotype is – -?

There are a couple of reasons you might find dashes instead of your genotype. If you see dashed for all of the genotypes, then you likely aren’t connected to your raw data file. Be sure to unzip the downloaded data and connect to the .txt or .csv file – not the .zip.

If you are just seeing dashed in a few of the genotypes, it is likely that your raw data file doesn’t include the information for that specific rs id.

The genotype section in each article indicates whether it is available on 23andMe versions 4 or 5 or AncestryDNA v.2 data. Most of the SNPs listed for 23andMe v4 are also found in the v3 data.