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Forum: DNA and Genealogy for Beginners 20th November 2013, 10:26 AM
Replies: 1
Views: 1,616
Posted By cacio
I am not an expert of the haplogroup, but from...

I am not an expert of the haplogroup, but from what you have probably read, I and its subgroups are thought to be the most ancient extant haplogroup in Europe, meaning that it dates before the latest...
Forum: Family Finder Advanced Topics 5th November 2013, 09:48 PM
Replies: 5
Views: 1,473
Posted By cacio
I don't know the statistics, but from my...

I don't know the statistics, but from my experience Italians have not tested much. As others have stated, most are either Americans of Anglo saxon origin (or somewhat less often German or...
Forum: Family Finder Advanced Topics 16th October 2013, 04:29 PM
Replies: 2
Views: 1,798
Posted By cacio
Estimated percentages can be very imprecise, so...

Estimated percentages can be very imprecise, so you cannot draw precise inferences (I don't know how they compute the 1.66% standard error - it always seems so small). Also, people of mediterranean...
Forum: mtDNA - Advanced Topics 15th October 2013, 12:20 PM
Replies: 33
Views: 8,879
Posted By cacio
Yes, mtdna mutations are more infrequent, so...

Yes, mtdna mutations are more infrequent, so potentially there are more people with your mtdna. But the point, as said, is that very few Italians have tested, so for now you don't see them. People...
Forum: mtDNA - Advanced Topics 14th October 2013, 10:33 PM
Replies: 33
Views: 8,879
Posted By cacio
Lack of matches is actually pretty common, the 1%...

Lack of matches is actually pretty common, the 1% quoted perhaps refers to people of anglo saxon or ashkenazi origin, because for italians it is the probably the norm. The reason is twofold. First,...
Forum: DNA and Genealogy for Beginners 13th October 2013, 11:48 PM
Replies: 5
Views: 1,699
Posted By cacio
The small sections where the browser doesn't show...

The small sections where the browser doesn't show a match are either because the area is not tested at all, or because the test couldn't read the dna. There might be mutations here and there, but...
Forum: Family Finder Advanced Topics 13th October 2013, 11:41 PM
Replies: 4
Views: 1,798
Posted By cacio
Prairielad explained very clearly. Your intuition...

Prairielad explained very clearly. Your intuition is basically correct. But, as prairielad was saying, the right way of looking at this is to remember that you have two separate chromosomes (not two...
Forum: Family Finder Advanced Topics 13th October 2013, 11:28 PM
Replies: 4
Views: 1,325
Posted By cacio
As mtnmama was saying, matches on the mtdna are...

As mtnmama was saying, matches on the mtdna are rougher than those on the Y chromosome. If you match on HVR1 and 2 (the basic test), the common ancestor could be thousands of years ago. A full...
Forum: Paternal Lineage (Y-DNA STR) Advanced 13th October 2013, 11:15 PM
Replies: 6
Views: 1,611
Posted By cacio
As you know, the Y chromosome test looks at the...

As you know, the Y chromosome test looks at the purely male lineage. The 67 markers test is the most detailed, so once you get the results, there's not much more you can find about your paternal...
Forum: Family Finder Advanced Topics 11th October 2013, 11:06 PM
Replies: 3
Views: 2,041
Posted By cacio
As Juancarlos was saying, this could reflect...

As Juancarlos was saying, this could reflect ancient movements. Europe and Middle east are very close genetically, and there have been migrations for thousands of years. The spread of agriculture...
Forum: Family Finder Advanced Topics 11th October 2013, 04:53 PM
Replies: 10
Views: 2,454
Posted By cacio
These relations are too distant to be detectable...

These relations are too distant to be detectable via genetic test. It is certainly possible that those small segments are remnants of a relation of the type you mention, but it is equally possible...
Forum: mtDNA - Advanced Topics 11th October 2013, 04:40 PM
Replies: 6
Views: 1,907
Posted By cacio
Yes, that's correct. You can find your deep...

Yes, that's correct. You can find your deep ancestry paths. And if you find matches, you can also find distant relatives.

For instance, I am Italian. My mtdna belongs to a haplogroup that's most...
Forum: mtDNA - Advanced Topics 11th October 2013, 10:40 AM
Replies: 6
Views: 1,907
Posted By cacio
Mutations are simply random "mistakes" that...

Mutations are simply random "mistakes" that happen as the mtdna is passed down the generations. The ones in the mtdna are in the junk part and so have no medical implications. They are useful only...
Forum: Family Finder Advanced Topics 11th October 2013, 10:26 AM
Replies: 10
Views: 2,454
Posted By cacio
It's hard to say, 8cM could well be by chance....

It's hard to say, 8cM could well be by chance. There could be smaller chunks of DNA that could go back several generations, in other words, they could be spread throughout a given geographic area....
Forum: DNA and Genealogy for Beginners 10th October 2013, 04:20 PM
Replies: 39
Views: 6,091
Posted By cacio
As others have said, first of all check for...

As others have said, first of all check for verification of your results, mix-ups do happen.

FF is imprecise, so this doesn't necessarily mean that one of your grandparents was 100% Asian. Some of...
Forum: Paternal Lineage (Y-DNA STR) Advanced 4th October 2013, 10:59 PM
Replies: 31
Views: 4,269
Posted By cacio
Mmaddi and others explained very well. Italy is a...

Mmaddi and others explained very well. Italy is a complex country, with both middle eastern and northern influences, so tests often assign italians to the most various european and mediterranean...
Forum: Family Finder Advanced Topics 4th October 2013, 01:52 PM
Replies: 7
Views: 1,385
Posted By cacio
Making predictions on the relationship distance...

Making predictions on the relationship distance with one segment is very difficult. It depends also on the size of the common segment. It could be anywhere from fourth to ?-th cousins. If the segment...
Forum: Family Finder Advanced Topics 4th October 2013, 01:46 PM
Replies: 3
Views: 1,337
Posted By cacio
Population finder cannot be too precise for...

Population finder cannot be too precise for populations that are genetically similar, like European populations, or Jewish and European. Middle Eastern are genetically close to Europeans in general,...
Forum: DNA and Genealogy for Beginners 2nd September 2013, 08:26 PM
Replies: 10
Views: 2,047
Posted By cacio
To expand what efgen and other said, you must...

To expand what efgen and other said, you must check the number of mismatches between the two. Typically, there's no mismatch between two brothers, but occasionally mutations do happen, so it is...
Forum: Family Finder Advanced Topics 2nd September 2013, 08:12 PM
Replies: 4
Views: 1,749
Posted By cacio
To add to what others have said, full siblings...

To add to what others have said, full siblings share 50% of their DNA, half siblings 25%, first cousins 12.5%, and so on. So Family finder, which tells you how much you have in common with another...
Forum: mtDNA - Advanced Topics 4th August 2013, 11:14 PM
Replies: 3
Views: 1,155
Posted By cacio
Companies can certainly make mistakes in...

Companies can certainly make mistakes in assigning to a haplogroup (assuming moreover that they got the correct results, which is usually the case).

In the specific case, you have to consider all...
Forum: DNA and Genealogy for Beginners 17th July 2013, 10:02 PM
Replies: 3
Views: 1,207
Posted By cacio
Somewhat limited, as you point out. Still, most...

Somewhat limited, as you point out. Still, most people have tested only HVR, especially early on, so that's all one can do. If one belongs to a common haplogroup, of course, like somebody with rCRS,...
Forum: Family Finder Advanced Topics 16th July 2013, 04:47 PM
Replies: 19
Views: 3,671
Posted By cacio
I think what JSW means is that the Y dna test...

I think what JSW means is that the Y dna test cannot, alone, prove that two people are both descendant of a given person. It tells that they descend from the same family lineage along the paternal...
Forum: mtDNA - Advanced Topics 10th July 2013, 03:42 PM
Replies: 16
Views: 2,614
Posted By cacio
They are usually much more distant. Mutations in...

They are usually much more distant. Mutations in the mtdna happen unfrequently, so an HVR1 match could be several thousand years away. And even a full sequence match could be more than a thousand...
Forum: Paternal Lineage (Y-DNA STR) Advanced 8th July 2013, 11:38 PM
Replies: 10
Views: 2,069
Posted By cacio
It is common to have no matches. I am from Italy...

It is common to have no matches. I am from Italy and I only have a couple of distance 2 out of 12, and nothing more - and the distance increases when using more markers.

Unfortunately, as others...
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