DNA Search You may search by two methods. First, using a Clan Donald or Ysearch code. If you use the leading & sign the program assumes a Clan Donald code. Second, using a complete or partial haplotype. Any haplotype with at least two markers may be used. Results are displayed in tables with the search target as a comparison haplotype; the search-for person will be at the head of their table. Results may be restricted to a maximum TMRCA by putting a value in the first box below. This value defaults to 100 generations. More than 1000 will result in everyone. It applies to the result of clicking on a person's Clan Donald code in the data tables also. If you check the Truncate Tables box the individual tables will be truncated at the set maximum TMRCA, otherwise, if even one person has a low enough TMRCA, everyone in the table will be listed. These values will last indefinitely if your browser supports cookies.