Epigenetics

Nice introduction to human genetics/epigenetics from the BBC here:

http://video.google.com/videoplay?docid=9208477461799586076#

("The Ghost In Your Genes," also available on YouTube in multiple parts)

Our comprehension of the workings of genetics remains crude and primitive, despite advances. In 50-100 years we'll have a keener understanding of epigenetics... at which point no doubt some form of epi-epigenetics will be discovered and require further unraveling!