By John Shiffman (Reuters) -A former Colorado funeral home owner was sentenced to 20 years in federal prison on Tuesday for defrauding relatives of the dead by dissecting 560 corpses and selling body parts without permission. Megan Hess, 46, pleaded guilty to fraud in July. She operated a funeral home, Sunset Mesa, and a body parts entity, Donor Services, from the same building in Montrose, Colorado. The 20-year term was the maximum allowed under law. Her 69-year-old mother, Shirley Koch, also pleaded guilty to fraud and was sentenced to 15 years. Koch’s central role was chopping up the bodies…