1⢠T/F: many (species) embryos show anatomical asymmetry immediately at fertilization â¢
T/F: many (species) embryos show genetic or sub-cellular asymmetry immediately at fertilization â¢
T/F: In some instances, mRNAs and proteins already have polarized distributions before fertilization occurred, meaning some aspects of embryonic polarity is maternally determined
2. The mid-blastula transition describes the point of development where: (could be multiple correct responses) a. Zygotic gene transcription initiates b. Zygotic gene transcription terminates c. Maternal gene transcription initiates d. Maternal gene transcription terminates â¢
Which axis is specified by fertilization and cortical rotation in the frog embryo? a. A-P b. D-V â¢
In Xenopus development the mesoderm derives from the: a. Vegetal pole cells b. Marginal zone cells c. Animal cap cells â¢
Liver, lungs, and pancreas are derived from a. endoderm b. ectoderm c. mesoderm
2-4 Explain the earliest mechanisms specifying each germ layer ⢠XNR/Nodals are _____________ factors acting as morphogens to specify mesoderm. a. Secreted b. Intracellular
1⢠T/F: many (species) embryos show anatomical asymmetry immediately at fertilization â¢
T/F: many (species) embryos show genetic or sub-cellular asymmetry immediately at fertilization â¢
T/F: In some instances, mRNAs and proteins already have polarized distributions before fertilization occurred, meaning some aspects of embryonic polarity is maternally determined
2. The mid-blastula transition describes the point of development where: (could be multiple correct responses) a. Zygotic gene transcription initiates b. Zygotic gene transcription terminates c. Maternal gene transcription initiates d. Maternal gene transcription terminates â¢
Which axis is specified by fertilization and cortical rotation in the frog embryo? a. A-P b. D-V â¢
In Xenopus development the mesoderm derives from the: a. Vegetal pole cells b. Marginal zone cells c. Animal cap cells â¢
Liver, lungs, and pancreas are derived from a. endoderm b. ectoderm c. mesoderm
2-4 Explain the earliest mechanisms specifying each germ layer ⢠XNR/Nodals are _____________ factors acting as morphogens to specify mesoderm. a. Secreted b. Intracellular
