I1a3_Young
Regular Member
- Messages
- 550
- Reaction score
- 60
- Points
- 28
- Location
- FL
- Ethnic group
- Basically British
- Y-DNA haplogroup
- I1 Z63*
- mtDNA haplogroup
- H5b1
I1 and I2 branched about 27,500 years ago.
From 27,500 ybp to 4600 ybp, the population containing I1 males was isolated or "bottle necked." This is known because all I1 have about 300 of the same mutation which is radically different than the other ydna hgs that I've read about.
How is this possible in Europe, considering 27.5k ybp was an ice age, then a warming, then the LGM (presumed forced migration). Everything I've seen about Europe's population and cultures have shown spreading, mixing, and replacing with a certain predictability. None of the other haplogroups had this isolation.
What part of Europe could these I1 have been in during the ice ages and in between? What caused them to come out of isolation 4600 ybp? Did they maintain a territory through strength but refuse to invade others until overwhelmed by R1b expansion?
How could the I1 mesolithics survive the incursion of neolithic farmers and maintain yDNA continuity? Was the neolithic farmer mixing after 4600 ybp?
Perhaps there were many I1 groups and only one small group survived, and all of that one small group would have the 300 mutations. But if that were true then it would mean the others were 100% wiped out. I find that as unlikely as one group surviving unmixed for the long period of time. It's absolutely mind boggling that any yDNA hg could maintain isolation in a highly contested Europe for about 23,000 years.
From 27,500 ybp to 4600 ybp, the population containing I1 males was isolated or "bottle necked." This is known because all I1 have about 300 of the same mutation which is radically different than the other ydna hgs that I've read about.
How is this possible in Europe, considering 27.5k ybp was an ice age, then a warming, then the LGM (presumed forced migration). Everything I've seen about Europe's population and cultures have shown spreading, mixing, and replacing with a certain predictability. None of the other haplogroups had this isolation.
What part of Europe could these I1 have been in during the ice ages and in between? What caused them to come out of isolation 4600 ybp? Did they maintain a territory through strength but refuse to invade others until overwhelmed by R1b expansion?
How could the I1 mesolithics survive the incursion of neolithic farmers and maintain yDNA continuity? Was the neolithic farmer mixing after 4600 ybp?
Perhaps there were many I1 groups and only one small group survived, and all of that one small group would have the 300 mutations. But if that were true then it would mean the others were 100% wiped out. I find that as unlikely as one group surviving unmixed for the long period of time. It's absolutely mind boggling that any yDNA hg could maintain isolation in a highly contested Europe for about 23,000 years.