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6. The interaction between which two signalling pathways contributes to the maintenance of segment boundaries in Drosophila?
- Wingless (Wnt) and Runt
- Hedgehog and Wingless (Wnt)
- Hedgehog and Engrailed
- Sonic hedgehog and wingless
7. The response of the neural tube to sonic hedgehog protein depends on the concentration of the protein
8. Which of these is not a model organism?
- Rattus rattus
- Arabidopsis thaliana
- C. elegans
- Xenopus laevis
9. What is the function of the engrailed gene in arthropods
- To produce bands of denticles over the larvae
- To define the positional identity (front and back) of segments
- To code for a transcription factor which activates other genes relating to the development of camera eyes
- To control cell differentiation in embryos
10. What is the name of cell adhesion molecules?
- Lopsins
- Cadherins
- Integrins
- Hesins
11. What is the name for programmed cell death?
- Apoptosis
- Gastrulation
- Proliferation
- Differentiation
12. Which genes are only found in particular cells to help characterise it?
- Characterising genes
- Terminal target genes
- Regulatory genes
- Housekeeping genes
13. Which gene does the Wnt signalling pathway activate in Drosophila?
- Wingless
- Engrailed
- Int
- Hedgehog