Most traits carried are present on only the X-chromosome.
The Y-chromosome is smaller, and so, very few genes are located on this chromosome. Sex-limited traits are traits that are visible only within one sex. For instance, barred coloring in chickens normally is visible only in the roosters. Sex-linked traits would be considered traits like sickle cell anemia and color blindness. This is because the females have a second X gene to counteract the recessive trait.