#Question id: 7018
#Unit 5. Developmental Biology
On the extracellular side, integrins bind to the amino acid sequence, found in several extracellular matrix adhesive proteins. The amino acid sequence is:
#Question id: 7019
#Unit 5. Developmental Biology
During primary sex determination in mammals, the bipotential gonad is moved into the female pathway (ovary development) by the Wnt4 and Rspo1 genes, which promote accumulation of:
#Question id: 7020
#Unit 5. Developmental Biology
The pushing out of neural crest cells from the dorsal neural tube appears to be facilitated by fellow neural crest cells. The phenomenon known as:
#Question id: 7021
#Unit 5. Developmental Biology
The tracheal (respiratory) system in Drosophila embryos develops from epithelial sacs. The approximately 80 cells in each of these sacs become reorganized into primary, secondary, and tertiary branches without any cell division or cell death. This reorganization is initiated when nearby cells secrete a protein called Branchless, which acts as a:
#Question id: 7022
#Unit 5. Developmental Biology
Two teratogens known to cause cyclopia in vertebrates are jervine and cyclopamine. Both targets hedgehog pathway. Both teratogens inhibits:
#Question id: 7023
#Unit 5. Developmental Biology
When Chordin mRNA is injected into the dorsal region of Drosophila embryos, it induces: