Question

1. The only possible mechanism that contributed to cell fate changes in the 8-cell stage sea urchin embryo is maternal determinants. 2. Nanos and caudal mutants lack posterior structures. 3. Experimental introduction of yolk into a mammalian cleavage stage embryo may hinder cytokinesis. 4. During the first cleavage, the embryo undergoes a rapid cell cycle of G1, S, G2, and M. 5. The removal of the inner cell mass from a syncytial blastoderm results in lethality. 6. Demonstration of germ cell potential was acquired through transplantation of labeled inner cell mass cells to another embryo of the equivalent stage and different species. 7. In the intestinal stem cell niche, stem cells express ISG1 that is required for asymmetric division.

          1. The only possible mechanism that contributed to cell fate changes in the 8-cell stage sea urchin embryo is maternal determinants.
2. Nanos and caudal mutants lack posterior structures.
3. Experimental introduction of yolk into a mammalian cleavage stage embryo may hinder cytokinesis.
4. During the first cleavage, the embryo undergoes a rapid cell cycle of G1, S, G2, and M.
5. The removal of the inner cell mass from a syncytial blastoderm results in lethality.
6. Demonstration of germ cell potential was acquired through transplantation of labeled inner cell mass cells to another embryo of the equivalent stage and different species.
7. In the intestinal stem cell niche, stem cells express ISG1 that is required for asymmetric division.

true false questions 1 the only possible mechanism that contributed to cell fate changes in the 8 cell stage sea urchin embryo are maternal determinants 2 nanos and caudal mutants lack poste 77462

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