 Mutation accumulation affects the allocation of energy, and time that are directed towards growth and reproduction over the lifetime of an organism, especially the period of reproductive lifespan due to the fact that mutation accumulation accelerates senescence, this means that organisms must reach the optimum age of maturity at a younger age as their reproductive lifespan is shortened with accumulated mutation.Mutations happen, and they are completely random with respect to a need in the environment and fitness.Mutations can either be beneficial in which they increase an organism's fitness, neutral in which they do not affect an organism's fitness or deleterious where they negatively affect an organism's fitness.