#Question id: 16147
#Unit 4. Cell Communication and Cell Signaling
#Question id: 7242
#Unit 5. Developmental Biology
The
cells of posterior marginal zone act as
the equivalent of the amphibian Nieuwkoop center because:
A.
once the PMZ has formed, it controls the other regions of the margin.
B.
Cells of PMZ initiate other regions of the margin from forming their own
primitive streaks.
C.
the entire marginal zone produces Wnt8c (capable of inducing the accumulation
of -catenin) and secrete Vg1, a member of the TGF-family.
D.
The PMZ cells secretes nodal protein and Nodal activity is needed to initiate
the primitive streak.
E.
When placed in the anterior region of the marginal zone, a graft of PMZ tissue
(posterior to and including Koller’s sickle) is able to induce wnt signaling.
Which of the following option is correct?
#Question id: 28529
#Unit 5. Developmental Biology
FACKEL (FK) encodes an enzyme which function as a critical for pattern formation during embryogenesis, such enzyme is know as___
#Question id: 27512
#Unit 2. Cellular Organization
#Question id: 4901
#Unit 8. Inheritance Biology
Assume that the alleles A (dominant) and a (recessive) show a maternal effect mode of inheritance. In a cross between an Aa female and an aa male, what would be the phenotypes of the progeny?