[js1138]

My point in discussing dogs is that one shouldn't confuse variation in size and bone length with large changes in the genome. Small changes in regulatory genes account for the difference between wolves and chihuahuas.

[Southack]

"My point in discussing dogs is that one shouldn't confuse variation in size and bone length with large changes in the genome. Small changes in regulatory genes account for the difference between wolves and chihuahuas."

Really?! Regulatory genes control the different skulls between wolves and chihuahuas, you say?!

Chihuahuas skull.

Wolf Skull.

Oh, by the way...When do the modified T Rex skulls appear in the timeline? At the beginning of the T Rex species, middle, or at extinction?