BIOL303 Lecture Notes - Lecture 9: Gastrulation, Blastoderm, Syncytium

• School: University of Waterloo
• Department: Biology
• Course: BIOL303
• Professor: Bruce Reed

Document Summary

In the following diagrams of drosophila embryos, anterior is to the left and dorsal is uppermost. The dark shading represents protein or mrna localization. Expression of the gap gene kr ppel at syncytial blastoderm: Segment polarity gene expression pattern at cellular blastoderm: tailless expression at cellular blastoderm: Caudal protein expression at syncytial blastoderm stage: maternal dorsal mrna in the syncytial blastoderm: During the process of_________ _______________________, commitment refers to the state in which a cell s fate has become ____ ____________________________even though it is not showing any changes in cellular biochemistry or function. 2. 2) in the space provided below, explain the difference between. Specification and determination as they relate to commitment . (3 marks) (point form is acceptable) 2. 3) what type of specification is associated with the differentiation of the germline cells in c. elegans? (1 mark) 2. 4) what type of specification is associated with the invaginating endoderm of the sea urchin gastrula? (1 mark)