Across
- 3. Involved in beak size and shape variation.
- 5. Derives from neural crest cells
- 7. A singlaing centre at the mid-brain-hindbrain boundary.
- 8. Changes in the level of gene expression, resulting in differences in a trait compared to an ancestor
- 9. The ___ genes encode transcription factors
Down
- 1. The _____ arches are populated by NCC.
- 2. Roof of the mouth.
- 4. Gives rise to the tongue.
- 6. What neural crest cells do after specification