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Author Topic: Dateable Haplotypes?  (Read 445 times)
whoknows
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« on: April 21, 2012, 06:19:53 AM »

Are individual Haplo-types able to be dated?
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rms2
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« Reply #1 on: April 21, 2012, 06:46:51 AM »

They date to that individual's date of birth. If a man was born in 1960, for example, that is the date of his haplotype. I suppose you could back up and date his haplotype to the date of conception, but that would normally move things back only about nine months. Much easier to go with his date of birth.

I have an exact 37-marker match with a second cousin once removed (he has only tested to 37 markers). Our most recent common ancestor is my great-great grandfather (his great grandfather). Because of that match one can infer that we received our haplotypes unchanged since the time of my great-great grandfather, who was born in 1835.

That would be another way to date a haplotype, I guess.
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whoknows
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« Reply #2 on: April 22, 2012, 06:32:41 AM »

Appreciate your thoughts on that, seems, as ever with Y DNA genealogy, we are dependent upon inference.
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rms2
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« Reply #3 on: April 22, 2012, 07:11:23 AM »

Appreciate your thoughts on that, seems, as ever with Y DNA genealogy, we are dependent upon inference.

It is an essential part of reasoning, yes.
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spanjool
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« Reply #4 on: April 23, 2012, 05:14:00 AM »

I happen (through FTDNA) to stumble upon a 7th grade cousin: Ton van Vliet. The common ancestor is Gerrit Jansz (Gerrit son of Jan) van Vliet born 31th August 1727 near Utrecht, Netherlands.
In the 37 STR markers we differ in 2: DYS449 (30, mine 29) and CDYa (37, mine 36). So 2 mutations in 220 year or 7 generations (another example of intra familial speeding up of mutations: it should be 420 years).
In the same periode the van Vliet Y chromosome acquired around 5 new SNPs.
So  my haplotype is roughly 110 years old?
Hans van Vliet
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Mark Jost
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« Reply #5 on: April 23, 2012, 11:32:20 AM »

I happen (through FTDNA) to stumble upon a 7th grade cousin: Ton van Vliet. The common ancestor is Gerrit Jansz (Gerrit son of Jan) van Vliet born 31th August 1727 near Utrecht, Netherlands.
In the 37 STR markers we differ in 2: DYS449 (30, mine 29) and CDYa (37, mine 36). So 2 mutations in 220 year or 7 generations (another example of intra familial speeding up of mutations: it should be 420 years).
In the same periode the van Vliet Y chromosome acquired around 5 new SNPs.
So  my haplotype is roughly 110 years old?
Hans van Vliet


For both haplotypes of 37 markers, the simple TMRCA=((x mutations x13.5)/2Haplotypes)xYrsPerGen)

What does the FtDNA TIP calculator show?
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148326
Pos: Z245 L459 L21 DF13**
Neg: DF23 L513 L96 L144 Z255 Z253 DF21 DF41 (Z254 P66 P314.2 M37 M222  L563 L526 L226 L195 L193 L192.1 L159.2 L130 DF63 DF5 DF49)
WTYNeg: L555 L371 (L9/L10 L370 L302/L319.1 L554 L564 L577 P69 L626 L627 L643 L679)
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