The Big Tree: R-A6484
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.
CTS4296Mutations written with a red background fall within a region of the Y chromosome, such as the palindromic region, which has left the position of the mutation ambiguous. The true mutation may be at the indicated position, or at any one of a number of alternate positions.