Board Thread:Movie discussion/@comment-11023504-20150706222512/@comment-5111260-20151220055843

It's a little known fact that hybrids tend to obtain the most unique traits of the animals they're created from. The Indominus Rex possessed the notable traits of each dinosaur that was used to create it, only those said traits were more augmented due to genetic manipulation.

T-Rex was said to be very durable, and it's jaw power was unrivaled by any land predator that lived before and after it. With Indominus, that jaw power and durability would be increased. That's the main reason why the Ankylosaurus was killed so easily. T-Rex certainly couldn't pull off that tactic since even one swing to the head from that club would seriously injure and disorient it. Indominus survived the hit due to it's improved endurance.