In muscle, glycogen phosphorylase kinase can be activated by nerve stimulation even in the absence of hormonal signals. Nerve stimulation alone results in activation of glycogen phosphorylase kinase as a result of:

#Question id: 7095

#Unit 5. Developmental Biology

Which of the following, first discovered through mutagenesis studies in Drosophila, also function in the development of mammals like us?

a) hedgehog

b) homeobox genes

c) the Wnt family

d) the Toll signaling pathway

Which of the following combination is correct?

#Question id: 7096

#Unit 5. Developmental Biology

In which portion of the frog's life-cycle would a frog appear most similar to a mammal?

#Question id: 7097

#Unit 5. Developmental Biology

What property of the mammalian embryo permits the production of chimeric mice?

#Question id: 7098

#Unit 5. Developmental Biology

The role of maternal factors (such as Vg-1, Xwnt-1, and VegT) packaged into the vegetal region of the Xenopus oocyte is:

#Question id: 7099

#Unit 5. Developmental Biology

A fate map of a Xenopus blastula, just before gastrulation begins, shows that the top portion of the embryo will become ectoderm (skin and nerve), the central portion will become mesoderm (bone, muscle, and blood), and the lowest portion will become endoderm (gut). How is it that the endoderm and mesoderm, shown on the outside in the fate map, end up on the inside in the embryo after gastrulation?

#Question id: 7100

#Unit 5. Developmental Biology

If cells from the animal pole of a frog blastula (animal cap cells) are placed into contact with cells from the vegetal hemisphere, after removing the cells fated to form mesoderm, what is the result?