They're IDENTICAL twins, right? Why would their DNA be "virtually" the same? Why would there be ANY level of shock with that? ELI5 please.
Because, for each test, there are some SNPs that the lab is unable to determine ("no-calls"). But these are going to be different for each individual, and in fact for each test an individual takes.
There also are likely to be a very small number of SNPs that are simply read incorrectly.
Because of these two issues, the raw results for the two identical twins will almost certainly not be the same -- although the results would have been identical if they had been able to get (correct) results for every single SNP.
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They're IDENTICAL twins, right? Why would their DNA be "virtually" the same? Why would there be ANY level of shock with that? ELI5 please.
Because, for each test, there are some SNPs that the lab is unable to determine ("no-calls"). But these are going to be different for each individual, and in fact for each test an individual takes.
There also are likely to be a very small number of SNPs that are simply read incorrectly.
Because of these two issues, the raw results for the two identical twins will almost certainly not be the same -- although the results would have been identical if they had been able to get (correct) results for every single SNP.