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, there are diminishing returns after a certain number of markers. For exact matches who share a surname, this is usually at about 67 markers. Close but not exact matches at the Y-DNA37 or Y-DNA67 level can benefit from upgrading to Y-DNA111.
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Bob, John, and I have the same Genetic Distance. However, when compared, we have different probabilities for sharing a common ancestor, for example, within eight generations. Why?
Bob, John, and I have the same Genetic Distance. However, when compared, we have different probabilities for sharing a common ancestor, for example, within eight generations. Why?
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Why did the FTDNATiP™ probability become less when we eliminated the possibility of a common ancestor within the past seven generations? It seems that it should increase?
Why did the FTDNATiP™ probability become less when we eliminated the possibility of a common ancestor within the past seven generations? It seems that it should increase?
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When comparing two individuals, the DNA test shows them to be closely related. However, one has my surname and the other does not. Does the match with the similar surname mean we are more closely related?
When comparing two individuals, the DNA test shows them to be closely related. However, one has my surname and the other does not. Does the match with the similar surname mean we are more closely related?