Developmental Biology! Please answer all the questions
7) Mislocalization of oscar to the side of the oocyte near the nurse cells
| A | would relocalize PKA |
| B | Would not affect microtubes or embryo polarity |
| C | could destabilize the microtubule structures leading to mutant polarity |
| D | would not affect bicoid as it is already anchored to the membrane at this point |
8) Convergent Extension
| A | describes migration of cells in an "upward extending motion" |
| B | none of these answers |
| C | all of these answers (minus none of these answers) |
| D | proliferate in an 'upward extending motion' |
| E | requires cells to intercalate pushing the entire tissue in an upward extending motion |
9) The micromeres are the first cells that enter into the blastocoel of the sea urchin
| A | tend to localize near b-catenin positive ectoderm |
| B | and localize via FGF signaling from the ectoderm |
| C | all of the above |
| D | and localize via FGF receptors on the ingressing cells |
| E | extend filopodia to pull them into place |
10) The ventral furrow of a drosophila embryo
| A | none of these answers |
| B | purely moves cells inward but does not form a structure |
| C | creates the cephallic furrow |
| D | is a folding in of tissue on the ventral side of the embryo |
Oskar protein plays a role in polarization. It is usually expressed at the posterior end near microtubule. C. Thus resulting in mutant polarity
Convergent extension is the upward movement of cells using cellular motion. Correct choice is A
Micromeres are first signalled by beta catenin. Beta catenin plays a role in endoderm n mesoderm development. A. Is correct choice. ( Please note: the option has ectoderm mentioned maybe be incorrectly put)
Ventral furrow purely moves cells onwards but doesn't form a structure
Developmental Biology! Please answer all the questions 7) Mislocalization of oscar to the side of the...
Developmental Biology Help! Please answer all the questions 1) We discussed the fact that each stripe expression pattern is affected by the enhancer region that is utilized. Knowing that the maternal genes and the gap genes can both contribute to the pair-rule genes, and that in many cases multiple stripes may be contained in one area of GAP, how does the embryo have definition of stripes if all of these transcription factors can be within the same cell A it...
Developmental biology help! 1) In creating a keller explant, we are attempting to observe a the effects that bottle cells are required to achieve b autonomous convergence and extension c all of these answers d non-autonomous movements of gastrulation 2) In papers regarding frogs, quite a few genes were named will an X. What does this represent? a That the gene's products (mRNA or protein) were non-functional b none of these answers c that the gene was knocked out via...