2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/16631A stochastic genetic model for biological aging is introduced bridging the gap between the bit-string Penna model and the Pletcher-Neuhauser approach. The phenomenon of exponentially increasing mortality function at intermediate ages and its deceleration at advanced ages is reproduced for both the evolutionary steady-state population and the genetically homogeneous individuals.8 pages with 3 figures; to appear in Theory in BiosciencesStatistical MechanicsBiological PhysicsPopulations and Evolutiontext