This work investigates the biological correlation between the development of cancer and the aging process through the observation of pure line mice. Leonell C. Strong utilizes his extensive background in genetics and oncology to present a framework centered on the inheritance of susceptibility to malignant tumors. By analyzing specific mouse strains, the author argues that physiological changes associated with aging are inextricably linked to the genetic predispositions that govern oncogenesis.

Experts recognize this monograph as a foundational text for understanding the genetic basis of cancer in laboratory models. Readers frequently note the technical density of the prose, which reflects the specialized nature of mid-twentieth-century physiological research.