[datafatmunger]

So, I'm guess maybe this one: https://www.ncbi.nlm.nih.gov/snp/rs25531#frequency_tab

...and despite: "According to David Hinds of 23andMe on community forums, "nearly everyone (99.97%) is getting called as CC, and there is no clear heterozygote cluster" ... "the genotype calls for rs25531 on our platform are not meaningful." Looking at OpenSNP frequency data, this seems to be universal for direct to consumer genotyping services at this stage.... "

... but went looking for this in my own data anyway, and couldn't even find the rs#.

disclaimer: I have no idea what i'm doing.