Guest: Barbara Katz Rothman.

Genetics, says sociologist Barbara Katz Rothman, isn't just a science. It's a way of thinking, an ideology. She joins us today on Focus to discuss some of the controversial topics at the forefront of the field and how she addresses them in her recent book The Book of Life: A Personal Guide to Race, Normality, and the Implications of the Human Genome Project.

Guest: Kevin Davies.

Today on Focus, we'll look at the people and technology involved in the effort to decode human DNA. The quest became a race between a private venture and a government-sponsored team—but now the leaders have jointly announced that the code has been cracked. But many questions remain unanswered, and today's guest on Focus will try to tackle some of them. Kevin Davies is the founding editor of Nature Genetics and author of Cracking the Genome.

Guests: Terry Burnham and Jay Phelan.

How much of human behavior is genetically determined? We'll revisit this age-old question this morning on Focus as we talk with authors Terry Burnham and Jay Phelan. They claim that humans are well adapted to the environment in which they originated, but since we no longer live as hunter-gatherers, our basic instincts can lead to harmful behaviors. They also argue that knowing this can help us control our behavior and lead us to happier lives.