23andme provides 610545 RSID records (SNP, Chromosome, Position, Genotype). I compared mine to a person who is not related to me in any way and about 42% of the genotypes match. Wondering which genotypes for which RSID record must match in order to show relation,
Thank you.
EDIT
Let me rephrase the question:
How many identical SNP of half genotypes do I have to match before I can assume genetic relation?
Also, does it matter which chromosome and what position on the chromosome?
Any ideas, links, references etc. would be great.
Thanks
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written
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eddy.vasile •
If you're comfortable with scientific literature and want to see equations to deal with SNP data, I might recommend having a look here:
http://www.nature.com/nrg/journal/v16/n1/full/nrg3821.html#snp-based-measures-of-relatedness
To get a better sense of how genetic relatedness is computed and what it means, I might also recommend looking at information provided by 23andme:
http://blog.23andme.com/news/announcements/how-many-relatives-do-you-have/
Thanks. Read it. Interesting but too general. I need precise counts of SNPs and such. Found enough material at ISOGG
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Found this:
http://www.isogg.org/wiki/Identical_by_descent
Good enough for now.