Bruno has alzheimer disease. he frequently makes aimless comments and repeats words and phrases for no reason. he is most likely in the stage of the disease.

Bruno is most likely in the stage 2 of the Alzheimer's disease. The symptoms of Alzheimer's disease worsen over time, although the rate at which the disease growths varies. The stage 1 of this disease is not detectable and no memory problems or other symptoms of dementia are palpable, it is because changes in the brain associated to Alzheimer's begin years before any signs of the disease arise. Stage 2 in which Bruno is experiencing belongs to the symptoms of this stage, where there are minor memory problems, have difficulty in areas like finding the right word during conversations, remembering names of new acquaintances, planning and organizing and usually lose personal belongings, including valuables.

answer; i believe the answer is (polygenic inheritance;

i think it is dna, i'm not totally sure but i think it might be.