Answer:
Red-green color blindness can be broken down into two main types: Protan-type (“pro-tan”), which is a disorder of the first “prot-” type of retinal cones also called the L-cones, and Deutan-type (“do-tan”) which is a disorder of the second type of retinal cone also called the M-cones.
In music theory<span>, a </span>scale<span> is any set of musical </span>notes<span> ordered by </span>fundamental frequency<span> or </span>pitch<span>. A scale ordered by increasing pitch is an ascending scale, and a scale ordered by decreasing pitch is a descending scale. Some scales contain different pitches when ascending than when descending, for example, the </span>melodic minor scale<span>.</span>
