Board Thread:Fossil Fuels/@comment-3213993-20140709225627/@comment-6493791-20140807031811

@BastionMonk: The fact that a chicken embryo has a gene to allow extra tail vertebrae to be grown has nothing to do with whether or not the animal ever had that trait. Humans also have genes for growing extra vertebrae, it's considered a genetic mutation, a deformation. So in truth, Horner's work on the Chickenosaurus is indeed much like adding on foreign limbs and attachments to a normal body. He's causing a genetic mutation, not reversing the evolutionary sequence.