I just want to recommend this book about genetic testing and several related websites since this Board includes a lot of women (and the men whe love them).
Jessica Queller writes or has written for shows such as Gossip Girl, Gillmore Girls, Felicity, etc. (the WB type of show, and I've only seen Felicity). Some of the websites recommended are www.youngsurvival.org and www.facingourrisk.org.
She also discusses in the book about going to a WGA meeting about genetic testing and that writers go to meetings on hot topics with top experts.