Why are sex linked traits are more often expressed in males?

Because males create the sperm and when a male doesnt pullout his penis it makes the female pregnant

Explanation:

The male basically makes the baby

the cladogram shown here shows similarities and differences among several classes of vertebrates. anatomically, the four have limb structure as their common ancestor. we might separate the mammals from the other three classes because they a) divergent; do not lay eggs b) identical; are warm-blooded c) varied; a four chambered heart d) homologous; have mammary glands

not sure if this is what you'r looking for nnew= nold