A cat is discovered with a very short tail. Checking offspring for short tails will <span>prove that this change was caused by a genetic mutation and not because the cat lost most of its tail at some point in its life.</span>
Pass these traits on to their offspring because it would be a dominant trait.
Valves ensure blood flows toward your heart. Vein valves work to bring the blood that flowed down via arteries back up to your heart.
