Double Helix — Nancy Werlin

THE SECRET IS PART OF HIM.
Although Eli Samuels is barely out of high school, he's offered a job at prestigious Wyatt Transgenics by Dr. Quincy Wyatt, the legendary molecular biologist. The salary's amazing, the work is interesting, and Dr. Wyatt seems to be paying special attention to Eli. It's almost too good to be true. Is there a catch? Eli's girlfriend doesn't think so, but his father is vehemently against his taking the job and won't explain why. Eli knows that there's some connection between Dr. Wyatt and his parents -- something too painful for his father to discuss. Something to do with his mother, who is now debilitated by Huntington's disease. As Eli works at the lab, and spends time with Dr. Wyatt, he begins to uncover some disconcerting information -- about himself....