A Drosophila protein named for a "short" form of this process antagonizes Dpp to establish a morphogen gradient.
A Drosophila protein named for a "short" form of this process antagonizes Dpp to establish a morphogen gradient. Zebrafish squint and cyclops genes direct shield formation during this process, which begins at 50 percent epiboly. Bottle cells undergo apical constriction at the initiation of this process. During it, the marginal zone in Xenopus undergoes convergent extension and involutes around the dorsal blastopore lip, or Spemann's organizer. This process produces the archenteron (ark-ENT-uh-ron) and ecto-, meso-, and endoderm tissues. For 10 points, name this embryonic process that forms the three germ layers and a primitive gut from the blastula and is followed by neurulation.
A Drosophila protein named for a "short" form of this process antagonizes Dpp to establish a morphogen gradient.
gastrulation &lt;Smart&gt;