The advances that have been made in the realm of genetics are astounding. Not only has the entire human genome been mapped, but scientists have also discovered methods of modifying genes in people as well as plants and animals. With this progress has come a great debate about the ethics of genetic modification. People wonder if there should be limits to altering nature. Readers explore basic concepts of cellular biology, including DNA and genes. Then they are guided though the differing sides of the genetics debate and encouraged to take their own informed stance on the issues.