Chickens With Dinosaur Snouts

#1
Biologists have been working to understand the evolution and developmental biology of bird beaks. Research has shown that birds have a small set of genes associated with the development of the middle of their faces, while reptiles don't.

So the scientists 'knocked out' those genes in chicken embryos (stopped them from expressing) and lo and behold, produced chickens with many of the facial features associated with snouts in fossil dinosaurs such as Velociraptors. Some of the features of the birds' palates (roof of their mouths) changed too, to match what's observed in dinosaur fossils.

Interestingly, the fossil record seems to show that the various anatomical effects of doing this appear together. Among bird-ancestors in the fossil record, there are examples with the dinosaur configuration of features, and suddenly beaked examples appear with the bird configuration. (Punctuated equilibrium, I guess some might call that.)

Now they have a clue as to why that happened and why all of these features appeared at once. There may have been a single genetic change in genes controlling the developmental biology of the organisms' heads responsible for it.

http://news.yale.edu/2015/05/12/tweaking...laboratory
Reply


Possibly Related Threads…
Thread Author Replies Views Last Post
  Bacteria in a Dinosaur Bone Reignite a Heated Debate C C 0 182 Sep 14, 2018 04:00 PM
Last Post: C C
  Everything you thought you knew about dinosaur colours is wrong C C 0 169 Jul 24, 2018 03:23 AM
Last Post: C C
  Apparently This Is What a Swimming Dinosaur Looks Like C C 0 224 Dec 8, 2017 12:44 AM
Last Post: C C
  Petrified Dinosaur Found in Canada Yazata 3 1,235 May 14, 2017 11:19 PM
Last Post: Yazata
  130-Million-Year Old Proteins Still Present in Dinosaur-Age Fossil C C 0 249 Nov 23, 2016 08:09 PM
Last Post: C C
  Genetic Tweaks Are Revealing the Dinosaur Traits in Living Chickens C C 0 369 Nov 15, 2015 03:36 AM
Last Post: C C
  Dinosaur feathers found in amber C C 2 722 May 29, 2015 07:14 PM
Last Post: Magical Realist



Users browsing this thread: 1 Guest(s)