>From Family Tree DNA: A centimorgan is a unit of measure representing a 1% chance that a region of DNA will recombine in a single generation. A centimorgan block represents a continuous region of markers that HAVE NOT recombined and is shared between two individuals. The longer the block, the higher the probability a recombination event SHOULD HAVE occurred in that region. When two individuals have a region in common with a high rate of recombination they have a high probability of being related.
Wikipedia has some rather detailed information including the math formula: http://en.wikipedia.org/wiki/Centimorgan And here's the answer to Doug da Rocha Holmes' question about how much does a parent have in common, a first cousin, etc: http://www.isogg.org/wiki/Identical_By_Descent_segment -- For options, such as changing to List, Digest, Abridged, or No Mail (vacation) mode, log into your Google account and visit this group at http://groups.google.com/group/Azores. Click in the blue area on the right that says "Join this group" and it will take you to "Edit my membership." --- You received this message because you are subscribed to the Google Groups "Azores Genealogy" group. To unsubscribe from this group and stop receiving emails from it, send an email to azores+unsubscr...@googlegroups.com. To post to this group, send email to azores@googlegroups.com. Visit this group at http://groups.google.com/group/azores.