Next they’ll try telling us the elephant didn’t get its trunk by a crocodile tugging on it.
The genomes of okapi and giraffe have been sequenced, and the signatures of specific genetic changes that are unique to their lineage have been identified. It looks like it wasn’t an act of will after all, but the accumulation of small changes over millions of years. Surprise!
This is an interesting comparison between long-necked mammals, short-necked, related mammals, and mammals as a whole that identified a number of genes that showed evidence of selection. The idea was to find the genes associated with a specific morphological change.