Ancestry tests advertised poorly. Twins get widely different results-- video. Thoughts?

[Luso]

TLR; DNA tests are advertised in a way that people think they are pure science and 100% accuracy when obviously they aren't. Twins get widely different results across 5 different DNA platforms.

CBC host asks Health Policy professor (studying the ancestry business) : "How would you change the ad to be more appropriate?"

His answer: "I think my ads would be a little bit boring. Push the idea that this is recreation science... lets see how your DNA compares to a bunch of other peoples DNA. This won't be terribly accurate or precise but it is going to be fun." "Yes there are biological variations between populations but there aren't these discrete biological borders and this is a dangerous message in this world... which is scientifically wrong."



https://www.youtube.com/watch?v=Isa5c1p6aC0




I'd like to hear all your thoughts

Personally I understand it is testing 1% of my DNA and comparing it to populations it isn't necessarily decisive and accurate enough to give my actual 100% heritage.

[Brás Garcia de Mascarenhas]

Their 23andMe differences were minimal to be honest, still trusting this company.

[Luso]

Their 23andMe differences were minimal to be honest, still trusting this company.

Yeah. However, the point is it should be exactly the same since they are identical. But 23andMe won out of all the other tests tbh... also MyHeritage didn't do too bad in close results.

[Brás Garcia de Mascarenhas]

And wow, they are Sicilian\Polish. I thought they were Samoan or something, lol.

[Chris596]

And wow, they are Sicilian\Polish. I thought they were Samoan or something, lol.

Yeah me too, to be honest they don't look like they are 100% ,,european'' (I know, I know, it's right me who's talking about ,,looking like a european'') :D

[PaleoEuropean]

If identical twins split early they can have some genetic differences or recombination. Also how identical twins can have two different fathers.

[Luso]

This is some of their results:

https://i.cbc.ca/1.4982701.1547759152!/fileImage/httpImage/image.jpg_gen/derivatives/original_1180/23andme.jpg


https://i.cbc.ca/1.4982848.1547762633!/fileImage/httpImage/image.jpg_gen/derivatives/original_1180/ancestrydnafinal.jpg


https://i.cbc.ca/1.4982856.1547762756!/fileImage/httpImage/image.jpg_gen/derivatives/original_1180/myheritagefinal.jpg

[Luso]

If identical twins split early they can have some genetic differences or recombination. Also how identical twins can have two different fathers.

real identical twins (split from one egg into two) have the same DNA. Other twins may not, but true identical twins do. And these two are "true identical twins."

[PaleoEuropean]

real identical twins (split from one egg into two) have the same DNA. Other twins may not, but true identical twins do. And these two are "true identical twins."

All identical twins split from the same age, but identical twins with that share 100% dna split later. The earlier the split the more chances of dna difference, recombination and cross fertilization.

[Luso]

All identical twins split from the same age, but identical twins with that share 100% dna split later. The earlier the split the more chances of dna difference, recombination and cross fertilization.

Yeah, good point overtime DNA diverges -- I think it is 1 mutation ever 100 million base pairs copied in a generation. But still doesn't change the accuracy of testing/misleading accuracy in DNA testing.

[Ljubic]

I have an exact twin brother and our RAW-Data gives results that are 99% the same. The 1% comes from differences in the number of SNP's.

[Luso]

I have an exact twin brother and our RAW-Data gives results that are 99% the same. The 1% comes from differences in the number of SNP's.

Oh interesting. I mean raw DNA data shouldn't be very different. That's good.

[Luso]

I have an exact twin brother and our RAW-Data gives results that are 99% the same. The 1% comes from differences in the number of SNP's.

Oh interesting. I mean raw DNA data shouldn't be very different. That's good.

[Luke35]

I think the 23andMe is okay, the differences in the twins results did not change the gist of it, they still get a similar mix.

When I used to run my G25 coordinates on Poi's calculator, I could use the exact same populations and get a slightly different result on each run. Perhaps this is how the 23andMe calculator works, and every run can give a slightly different result as the algorithm looks for a best fit?

[JamesBond007]

*edited out*