Floating head mutants in zebrafish lack this structure. It can be easily studied in ascidians because it only consists of 40 cells.
Floating head mutants in zebrafish lack this structure. It can be easily studied in ascidians because it only consists of 40 cells. A protein secreted by this structure induces a concentration gradient of the same protein in the floor plate. Its namesake process is formed by cells from the primitive knot migrating away from the primitive groove. This structure develops into the nucleus pulposus. This structure secretes (*) Sonic hedgehog homolog to establish the dorsal-ventral axis. It induces the ectoderm to form the neural plate. This structure derived from the mesoderm is made of a cartilage-like material. For 10 points, name this structure which is present in all vertebrate embryos, and is the namesake of the phylum containing vertebrates.
Floating head mutants in zebrafish lack this structure. It can be easily studied in ascidians because it only consists of 40 cells.
notochord