Brunitski wrote:Atheistoclast wrote:Calilasseia wrote:
Indeed, developmental embryologists the world over will be pissing themselves if they read that ...
Except that developmental biologists don't know the answer - morphogenesis remains the biggest unsolved mystery of biology. They do know the stages of development and they observe all the various stages and processes in detail but they have no clue as to why a zygote divides into different cells and why particular organs form and so on. After all, there is nothing in DNA that encodes the structures and body plans of an organism, only the proteins and RNAs that are used in its make-up and operation. Moreover, evolutionists are equally clueless as to how there is so much diversity of form when there is so much genetic homology between even "distantly related" species. Put it this way. Giraffes and whales are supposed to be close relatives and thus share very similar DNA. But their anatomy is markedly different. The evo-devo crowd would have you believe that it is all a matter of the timing of gene expression - now that is pure comedy!
You hit every branch of the stupid tree when you fell out of it didn't you? Are you seriously going to say what you just said ON THIS FORUM, with out even googling?
Hox gene much?
Far. fucking. out.
It seems I have really upset the atheists this time! Hox genes work by activating (switching on) the genes required at developmental stages by binding to transcriptional regulatory regions - they don't encode the form of segment structures. Moreover, they are among the most conserved families in the genome such that they can be swapped between species in transgenesis experiments. As such, they don't explain the morphological differences between taxa.