Exam 1: Cell Differentiation and Neural Induction

What experimental result demonstrates the concept of self-regulation?

Regions of a gene that do not encode for any mRNA are

When Delta and Notch bind together, a Notch fragment joins with _______ to create a transcription factor that _______ proneural gene expression.

The first recognizable structure that embryos form is the

List three characteristics of C. elegans that make it particularly useful for studying genetic mutations.

If developing cells communicate with one another to induce a particular fate in neighboring cells, the very first cells must receive their instructions of what to become from

Why is the C. elegans strategy of development referred to as the "European plan" and the vertebrate strategy of development referred to as the "American plan?" Name the two animal development strategies referred to by each, and explain why each is akin to "European" or "American" ideals.

One of the earliest experimental embryology experiments was conducted by Wilhelm Roux, who used a hot needle to kill one of the cells in an amphibian embryo at the two-cell stage. In the experiment, the remaining living cell formed only half of an embryo. However, later vertebrate experiments showed that by completely separating cells in early embryos, each can make complete individuals. What could explain the discrepancy in these experiments?

The crease formed by the primitive streak is more pronounced at one end, called the node, which will form the

What is an advantage of having many inductive steps (e.g., an organizer to organize another organizer) in an embryo?

If cells follow their particular fate regardless of what their neighboring cells do, they are said to have _______ specification.

Molecules that regulate gene expression are called

If you wanted to disrupt blastopore formation on a blastula, you could

The theory that an organism develops by gradually changing to acquire new, more complex structures is called

Which germ layer provides the cellular precursors to the nervous system?