Why do you only need one copy of a dominant trait gene to have that trait?

Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?

As a result of these processes the single celled organism accomplishes

Dr. arenas is a scientist who has been trying to determine if increasing pressure will increase the sound that occurs when two chemicals explode. it measures the volume of the sound that occurs at the minimum pressure at which the explosion will occur. it then increases the pressure and measures the volume of the explosions that occur. what kind of investigation is the scientist conducting?