The Big Tree: R-BY2745
19503820-T-CA green SNP name with a '?' indicates that the SNP's status for the block is uncertain, but assumed to be positive. The same SNP probably occurs in an upstream block. It will be necessary to check BAM files or perhaps Sanger sequence some men to prove the result.
Z18068SNP names which are bold grey indicates that their exact position on the tree is uncertain. This SNP may belong further upstream or all downstream branches may not be positive for it. This is often the case for SNPs found in FGC kits or 1kG kits in regions not covered by BigY tests.