Question

Question 7 1 pt What is true about specification in C. elegans? (select all that apply) gastrulation is initiated by movement of E-derived cells towards the center of the embryo the sperm's centrosome initiates contraction of the eggs cytoskeleton contributing to mechanisms that polarize the cytoplasm and cell the first cell division is asymmetric, with one daughter cell becoming a founder cell and the other becoming a stem cell polarization of cytoplasm at the one cell stage is accomplished by segregation of specific PAR proteins into anterior and posterior regions of the cell « Previous Next

Answer 1

All the options are true about specification in C. elegans .

Centriole of sperm proinucleus instructs the movement of cytoskeleton as it enters the oocyte cytoplasm. This cause the polarization of cytoplasm and cell.

The first cell division results in the formation of two uneven blastomeres implying that asymmetric cleavage took place. One of them becomes the founder cell and another becomes the stem cell

Gastrulation begins when E daughter cells (Ea and Eb) migrate to the centre of the embryo from the ventral side.

PAR proteins cause the localisation of PAR granules which contain translation factors, polymerases, RNA helicases, translation initation factors, etc. towards the posterior side of the cell thus forming an anterior -posterior polarity.