The Hardy-Weinberg principle is not generally found in nature because it requires certain conditions in an environment. These conditions are the absence of the things that can cause evolution. In other words, if no mechanisms of evolution are acting on a population, evolution will not occur--the gene pool frequencies will remain unchanged.
Gum disease is a very common condition where the gums become swollen, sore or infected. The gums tend to bleed after you brush or floss your teeth, and the blood in your mouth causes the metallic taste. If left untreated, the tissues and bone that support the teeth can also become affected (known as periodontitis).
Metallic Taste in Mouth. Metallic Taste in Mouth, scientifically known as âDysgeusiaâ, is a condition in which the taste of your mouth changes to something very sour and foul. You might feel as if you have something metallic inside your mouth, even when you are not eating anything. The one and only symptom of metallic taste is the continuous presence of a bitter and acidic taste in the mouth.