How do you explain flaw in a world engineered by God? Avise extends this age-old question to the most basic aspect of humanity's physical evidence-- our genes--

Presents a history of thalassemia, a genetic disorder in which the body destroys abnormally-shaped hemoglobin cells at a rate that leads to anemia.

Across these fields, there is increasing appreciation of the need to quantify the genetic - rather than just the phenotypic - basis and diversity of key traits,

John Waller describes the changing ideas concerning heredity from antiquity to the modern biological understanding, considering both the efforts over the centur