Set: <span>put, lay, or stand (something) in a specified place or position. repetition: a thing repeated a line can be a set and have repeating things in it</span>
It is sex-linked: genetic red–green color blindness affects males<span> much </span>more<span> often </span>than females<span> because the genes for the red and green color receptors are located on the X chromosome, of which </span>males<span> have only one and </span>females<span> have two.</span>
