The recombination rate across the human autosomal genome is highly variable. Therefore, DNA segments that are the same number of base pairs long may have much different centiMorgan (cM) values depending on their location.
If two people share part of the same DNA segment with me, will the centiMorgan value for each segment be proportional to how long the segments look?
Overlapping DNA Segments cM Matching on Chromosome 1 Match 1 Match 2 Non-Match 20.5 7.6 No. Part of a matching DNA segment may have a higher or lower centiMorgan (cM) value than the segment's average. One [...]
Is it more significant if two of my matches have identical start and stop points than if the segments simply overlap?
No. When two of your matches' DNA segments share exact start and stop points, it is not more significant than when they simply overlap. There are two reasons for this. Both are due to current [...]
You talk about matching DNA Segments. Is there a minimum number of matching segments in order for two people to be considered a match?
Although the number and size of matching DNA segments are considerations in calculating how two people are related, there is not a minimum number of segments for two people to be considered a match.
No. The Family Finder software does not use mitochondrial DNA results for matching or relatedness calculations. The Family Finder program uses only the autosomal SNP (single nucleotide polymorphism) test results from the Family Finder microarray chip.
No. The Family Finder software does not use Y-chromosome DNA (Y-DNA) results for matching or relatedness calculations. The Family Finder program uses only the autosomal SNP (single nucleotide polymorphism) test results from the Family Finder microarray [...]