Chapter 22

3. The division of an organism into repeating units, specifically on the anterior/posterior axis.
9. This section of the developing embryo gives rise to the midbrain.
10. In this stage of embryonic development, a folding process creates a tube that is crucial in future development of the brain.
11. The sharp bend in the neural tube that balloons out into the prosencephalon.
15. Which embryonic germ layer gives rise to the neural tube?
16. This section of the developing embryo gives rise to the cerebrum.
17. These genes influence the segmentation of human embryos.
18. Which embryonic germ layer gives rise to the organs?
19. Cells These cells may become any other type of cell, depending on input from their surroundings.
20. These formations will later become eyes.

1. In this stage of embryonic development, the cells migrate to create three distinct layers.
2. This section of the developing embryo gives rise to the pons and cerebellum.
4. This section of the developing embryo gives rise to the medulla.
5. This section of the developing embryo gives rise to the thalamus and hypothalamus.
6. The transient section of the dorsal neural tube that gives rise to peripheral sensory neurons and glia.
7. The transient section of the coral neural tube that gives rise to interneurons in the spine and hindbrain.
8. These cells form bicycle-like spokes to aid in neural migration.
12. Which embryonic germ layer gives rise to the lining of the organs?
13. These genes influence the segmentation of Drosophila.
14. What determines whether cells in the dorsal ectoderm give rise to epidermal or neural cells?