Usually genes in the body called p53’s, proofread our DNA cells for abnormalities. When p53 detects an abnormal DNA cell, they will repair it. However, when the p53 gene is destroyed, nothing will regulate the abnormal cells. The abnormal cells grow into full-blown cancer. So, what destroys p53 genes in the first place? Mutagenic chemicals; cigarette smoke is full of them. Although, one cigarette is not likely to induce cancer, smoking many cigarettes increases the odds of disaster. It is like playing a game of russian roulette. How many drags will it take to finnaly destroy the p53 gene? The more you “play” the more you increase your odds of detroying the p53 gene and obtaining cancer growth.