Jovialis
Advisor
- Messages
- 9,311
- Reaction score
- 5,861
- Points
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- Ethnic group
- Italian
- Y-DNA haplogroup
- R-PF7566 (R-Y227216)
- mtDNA haplogroup
- H6a1b7
I've based my Y-HG assumption on the region I come from and the physical appearance, before all the hight in my family (I'm 198 cm and all of them are and were far above the average). So for 2 years I've been reading everything on this forum about I2a. Finally I decided to do the testing. The results came and caugth me really unprepared. Instead of a confirmation of what I was 99% sure about, it turned out to be E-V13. Well, just a small anecdote about making assumptions and generalisations...
You should read this article by Razib Khan.
This is a public service announcement. If you are a user of direct-to-consumer personal genomics services, please do not pay any attention to your mtDNA and Y chromosomal haplogroups. Why? Because they hardly tell you anything about your individual ancestry. What do I mean by this? Your mtDNA comes down from your mother’s-mother’s-mother’s-mother… and similarly for your Y chromosomal lineage if you are a male. These few individuals are not any more likely to contribute to your ancestry than all those multitudes and multitudes who do not contribute to your mtDNA or Y lineages; also known as almost all your ancestors! What you should pay attention to are your autosomal results. Inferences made from most of your genome. These results may be more difficult to parse, but difficulty is no sin, and elegant ease is no virtue, in this case. That’s because you are interested in your ancestry, not a convenient interpretable story.
Of course I am not saying that mtDNA and Y chromosomal haplogroups are useless. They are useful for population scale phylogeography. But please don’t make inferences about yourself from one data point. At least in most cases.
Edit: Think about it this way, many mestizos from South and Central America have the Spaniard Y-HG of R1b. Many African-Americans have the British/Scots-Irish Y-HG of R1b. Many Northwest Indians have the Indo-Aryan Y-HG of R1a. Nevertheless, their autosomal DNA is what truly gives them their ethnic identity. Doesn't mean they can't be proud of their Y-HG though. It means there's a lot more to their ancestry than just haplogroups; autosmal DNA is more important. It's the bulk of what make you, you.
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