Trichromatic vision, lactose tolerance, and HIV resistance are a few examples of advantageous mutations. There are numerous well-known instances of advantageous mutations. Here are only a couple: Many bacteria have mutations that enable them to endure antibiotic treatment. Bacterial strains resistant to antibiotics result from mutations. In a small Italian town, inhabitants have a rare mutation. one that enables a rabbit to conceal itself from predators by changing its colour. A dog's tail is born shorter than it should be due to a mutation.