I think this is a good illustration of the randomness of DNA. I'm comparing Me, my sister, and my daughter to my paternal aunt(my daughter's maternal great aunt.) Click on the image to enlarge.
The above segment matches are of segments matches which are 5cM or highter on the FTDNA chromosome browser. I've uploaded to GEDmatch and can do One To One comparisons. I'll be able to run a list of matches and other comparison reports once it batch processes.
At GEDmatch with a threshold of 7 cMs or greater:
I match my Aunt at 1610 cMs over 39 segments(largest segment of 102cMs)
Sis matches Aunt at 1548 cMs over 45 segments(largest segment of 158 cMs)
My daughter matches her Great Aunt at 785 cM over 25 segments the largest is 72 cMs
For more DNA tools and reference click on the link in the blog menu at the top of the page (DNA Tools & Reference Links)