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View Full Version : FTDNA - Big Y Bam file - what can you learn from it / who can request it



Gaku
07-30-2016, 09:24 AM
I just got my FTDNA Big Y file and included was "BAM".

I know you can put that on Williamson's - well provide it to him - Big Y tree.

However, I am curious.


What else can you learn from it?

And who can request it?

Can someone else request the BAM file? I see group admins you can limit access to your information about --- but what of a DNA "relative" can they request your BAM file from FTDNA?

lgmayka
07-30-2016, 09:46 AM
What else can you learn from it?
If you submit it to YFull (https://yfull.com/)for analysis, they can place your entry on their haplotree of the entire human race (https://yfull.com/tree/). YFull estimates TMRCAs (https://yfull.com/tree/R-P312/), measures Y-STRs (markers), etc.


And who can request it?
A project administrator can request that FTDNA generate the BAM file--the BAM file is not generated automatically--but the BAM file itself is only accessible to the account owner (or anyone who has his password).

Gaku
07-30-2016, 10:01 AM
If you submit it to YFull (https://yfull.com/)for analysis, they can place your entry on their haplotree of the entire human race (https://yfull.com/tree/). YFull estimates TMRCAs (https://yfull.com/tree/R-P312/), measures Y-STRs (markers), etc.

A project administrator can request that FTDNA generate the BAM file--the BAM file is not generated automatically--but the BAM file itself is only accessible to the account owner (or anyone who has his password).


Thank you. The YFull sounds interesting.

So if I put the project admin to "read only" for example they can't request a BAM file I am taking it. What of partial access?

Gaku
07-31-2016, 10:40 AM
Oh can one glean any health related information from big Y BAM files by chance?

lgmayka
07-31-2016, 03:07 PM
Oh can one glean any health related information from big Y BAM files by chance?
FTDNA deliberately removed mtDNA results from the BAM file, partly because (I suspect) mtDNA occasionally has medical significance. FTDNA steps carefully in order not to run afoul of government regulations on medical "diagnosis."

Any Y chromosome results, even simply Y-DNA12, can on rare occasions give some indication of fertility. (If enough nulls/zeroes appear in your Y-DNA results, you might be missing enough of the Y chromosome to diminish your likelihood of siring children.) But no one really worries about this rare implication, partly because it's so iffy anyway. Most members of haplogroup N are missing a segment of their Y chromosome, but that did not prevent them from multiplying across Northern Eurasia.

lgmayka
07-31-2016, 03:12 PM
So if I put the project admin to "read only" for example they can't request a BAM file I am taking it. What of partial access?
The project administrator can never access your BAM file unless you specifically give her/him the encrypted hyperlink to the file (or, of course, your account password).