Y DNA

[amilne109]

What type of incident causes the Y DNA line to spit to form a new branch?

[David Nicoll]

Hi, just birth, small changes in DNA replication, nothing is perfect.

[familydar]

I wonder if age might have a bearing too, but the technology hasn't been around for long enough for a definitive answer.

Jane :-)

[Biggles50]

A branch of a haplogroup happens when a genetic mutation takes place.

[jc26red]

Mutations and usually difficult to pinpoint.

In my husbands case… yes we created a new subdivision 😎… he is haplogroup C which is one of the earlier haplogroup and origins are far east and native American mostly  from analysed ydna tests done which have a proven paper trail, the haplogroup trees are constantly evolving through ydna uptkae and analysis.
Going back to my husband, we were members of a named group and one person in the USA had a very similar family tree as my husband, both researched separately and both originating from the same part of Ireland, same social standing, both families liked to write down the family history over the generations etc which matched. The USA man had his ydna done and it came back as haplogroup C with a likelihood of native American NPA suggested, well he wasn’t having any of that as it would have shot his years of research out of the window. He and the name group co-ordination who also had an interest in my husbands tree asked if he would do a test and they would pay!  As it is a rare group we did a lower test 37… 111 wasn’t around back then. The results came back as haplogroup C and our family  had never left Ireland with proven documents. It caused a bit of a stir with the YDNA co-ordinators and after extra STR testing they found a small change and created a European branch which is different to the native American and far east main branch. Another Irish heritage haplogroup C man took an 111 test  when it came out to have the sub branch mapped out as far as possible. 
Because it is a rare group and given all the paperwork for all three men lead back to within less than a 5 mile radius, it was only necessary for one person to do the big test.

This mutation must have occurred thousands of years ago, well beyond a paper trail.  How did this group arrive in Ireland? Our family are supposed to have come from England but there is no proof as no one outside of the family have tested as C in the UK. There are small pockets in Spain and Italy, everyone now believes that haplogroup C arrived in the UK via Roman soldiers or slaves… until proved otherwise this is the most likely explanation.