Search for content in message boards

Interpreting match -- can brothers be off by one number on one marker?

Replies: 4

Interpreting match -- can brothers be off by one number on one marker?

Posted: 1363279243000
Classification: Query
Edited: 1363292089000
I have a match between my uncle and another man who was born 2 years prior to my uncle and put up for adoption. I believe they are half brothers, sharing the same father. They match on all markers except one: DYS 456 17 (my uncle) DYS 456 16 (possible half bro). Does this one number difference on one marker mean that they can't be brothers? Do they share grandfathers instead?

I'm attaching the comparison chart of the two DNA tests.

Thanks!
Attachments:
SubjectAuthorDate Posted
chitcat 1363279243000 
APTurner 1363283678000 
chitcat 1363285791000 
Shari S. 1363287260000 
APTurner 1363297120000 
per page

Find a board about a specific topic