Intro Flashcards
1
Q
What is the endomesoderm?
A
Blastomere that is not yet differentiated into mesoderm of endoderm but is destined to give rise to either
2
Q
What is special about sea urchin endomesoderm?
A
Arguably the most complete gene regulatory network of any metazoan.
3
Q
Which type of cells constitute the endomesoderm signalling centre?
A
Vegetal micromeres due to an asymmetrical distribution of B-catenin
4
Q
What is the fate of veg2 cells?
A
Endoderm and non-skeletogenic mesoderm
5
Q
What is the fate of large micromeres?
A
Skeletogenic mesoderm (PMC)
6
Q
What is the fate of small micromeres?
A
Coelomic pouches
7
Q
What are the two types of specification to establish endomesoderm?
A
Initially autonomous specification, then becomes conditional specification
