19 out of 50
False regarding gastrulation (AIIMS – Nov 2010)
|A||Primitive streak formation starts before gastrulation|
|B||Nodal gene is required for the establishment of primitive streak|
|C||Cephalic end of the embryo is established before the formation of primitive streak|
|D||At the posterior tip of the primitive streak forms a thickening called Hensen's node|
At the posterior tip of the primitive streak forms a thickening called Hensen's node
Henson’s node is at the anterior tip of primitive streak.
Nodal geneis required for the initiation and maintenance of primitive streak and Hensen’s node.