Ralph ... Here the numbers for the Humphrey project at FTDNA: Unique Tested U/T T/U Y-12 42 64 0.66 1.52 Y-25 40 51 0.78 1.28 Y-37 43 45 0.96 1.05 Y-67 20 20 1.00 1.00 Thanks ... Mike ... ====================================== Thanks to those who contributed their data for tests per haplotype. Here it is, summarized: Comparison Level Cruwys MacLaren Short Taylor Y-12 2.52 2.04 1.58 1.56 Y-25 1.66 1.42 1.36 1.16 Y-37 1.36 1.21 1.29 1.07 Y-67 1.00 1.18 1.00 1.03 What shows the pattern more clearly, however, is the inverse ratio -- haplotypes per test: Comparison Level Cruwys MacLaren Short Taylor Y-12 0.396 0.490 0.633 0.643 Y-25 0.604 0.704 0.735 0.860 Y-37 0.736 0.826 0.778 0.935 Y-67 1.000 0.847 1.000 0.971 For haplotypes per test, 1.000 represents "complete diversity"; every test produces a separate pattern. "Perfect uniformity", where each test produces the same haplotype, would approach zero (0). The data and a graph have been published at http://freepages.misc.rootsweb.ancestry.com/~taylorydna/diversity-dna.shtml. -rt_/)