In frogs, maternally packaged Xwnt-11 leads to nuclear localization of __________ in the __________, which in response signals to adjacent cells to become the __________.

Question

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a
β-catenin, Nieuwkoop center, Spemann organizer

b
nodal, signaling center, shield

c
Vg-1, vegetal region, Nieuwkoop center

d
Sonic hedgehog, limb bud, posterior

e
GFP, mesoderm, muscle and bone
Question 4

Removing the ventral blastomeres from a four-cell amphibian embryo gives rise to an embryo lacking which tissue?
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a
Notochord

b
Neural tube

c
Somites

d
Gut

Answer 1

b
Neural tube