Guest: Nicholas Wade.

The sequencing of the human genome is set to change medicine forever. Today on Focus, science writer Nicholas Wade joins the show to explore the impact genetic science will have on how diseases are diagnosed and treated. We'll also review stem cell research, the treatment it may be able to offer treatment for a range of debilitating conditions, and the ethical controversy still surrounding it.

Guest: Bryan Sykes.

What if we could trace our genetic makeup all the way back to fewer than ten primeval individuals? In fact, says geneticist Bryan Sykes, we can. He joins us today on Focus to explain how the study of a 5,000-year-old man's frozen remains in Italy led to the discovery of a particular strand of DNA that can be traced back to seven prehistoric women: The Seven Daughters of Eve.

Guest: Lori B. Andrews.

What are the benefits and drawbacks of genetic testing? Who should have access to your personal genetic information? How do we decide which genetic therapies should be made available? Today on Focus, we're joined by top genetics lawyer Lori Andrews to tackle these questions and talk about her new book, Future Perfect.