It results in the formation of the archenteron, and the formation of mesoderm, ectoderm, and endoderm cell layers.
In Drosophila, genes involved in this process include concertina and fog. In amphibians, bottle cells form near the gray crescent during this process that is initiated by the Spemann-Mangold organizer. Steps involved include convergence, extension, and epiboly, as well as cell movement to create the primitive streak or the blastopore. It results in the formation of the archenteron, and the formation of mesoderm, ectoderm, and endoderm cell layers. FTP, identify this process of invagination that initiates the embryonic stage following the blastula.
In Drosophila, genes involved in this process include concertina and fog.
{gastrulation} (prompt on "invagination" before "convergence")