Some, not all of the lectures from the DNA Workshop, organized by Maurice Gleeson and Debbie Kennett of the International Society of Genetic Genealogy (ISOGG) and sponsored by Family Tree DNA, are now available on YouTube.
One I caught in person and will want to view again is Who's your cousin? Using DNA to determine relatedness , an interesting simulation study to derive statistics of relatedness from autosomal DNA tests, given by Doug Speed from University College, London.
You can download a copy of the paper that Doug referred to via this link:
ReplyDeletehttp://dougspeed.com/wdytya/
Figure 2B in the paper was included in the presentation and is particularly enlightening because it shows the distribution curve of the age of the DNA segments. The take home message is that the vast majority of smaller segments date back a very long way, often 20 generations or more. The simulations were done using megabases rather than centiMorgans and I'm not sure how much this affects the stats. A megabase often corresponds to a centiMorgan but not always.