Jim, are these probabilities cumulative in the sense that the percentage given is for some relationship more distant than the one cited or less distant or exactly the one cited?  I actually want to know why my wife has far more proven relatives of her father on 23&Me than the total number of relatives he has on FTDNA. John L Jim B wrote TDNA has posted the probabilities of a specific relative passing theirfilter and showing up as a match with us.Parents and 1st cousins - virtually 100 percent2nd cousins about 99 percent3rd cousins about 90 percent4th cousins about 50 percentdeclining percentages beyond that On