1.
Rod-like structure that defines the embryo's midline and induces neural development -
2.
First cleavage divisions after fertilization produce these cells -
3.
Outermost germ layer that forms skin and brain -
4.
Stage of the embryo that is a fluid-filled hollow ball -
5.
Morphogen gradient that patterns anterior structures in Drosophila embryos -
6.
Neural tissue precursor formed through ectodermal induction -
7.
Transient embryonic structure that guides the development of vertebrae -
