How do I find out the time to the most recent common ancestor in years?

You can convert from generations to years by multiplying the number of generations by an average number of years between generations. In general, you [...]

Do all FTDNATiP™ calculations offer the ability to add genealogical data? Why don’t you always show it?

When using the FTDNATiP™ calculator in myFTDNA, the box in which to enter the number of generations appears only when you are not comparing [...]

How does Y-chromosome DNA (Y-DNA) haplogroup prediction work?

At Family Tree DNA, a Y-DNA haplogroup prediction is calculated using genetic distance. The calculation finds your most likely haplogroup. The prediction program compares [...]

How do I know which SNPs make sense for me to order?

Please order SNPs with the help of an expert if you aren’t sure which SNP(s) will benefit your research. Before ordering, you should ask [...]

Will testing additional STR markers improve FTDNATiP™ calculations?

Yes, a higher number of compared Y-DNA STR markers does increase the power and accuracy for Time to Most Common Ancestor (TMRCA) calculation. However, [...]

How does the infinite allele comparison method work for palindromic markers?

For palindromic markers, the infinite allele method counts a difference for two types of changes: a mismatch and a copy number change.

Mismatches occur when the [...]