CSB328H1 Lecture Notes - Lecture 17: Telson, Prostomium, Blastoderm
15 Nov 2016
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Document Summary
During syncytial blastoderm stage: molecular pre-pattern forms. The activity of different genes in different regions of the embryo and the gene activity is symbolized by the different colours (handout) Blastoderm fate map of drosophila (handout: acron, head, thorax, abdomen, telson. The posterior part looks normal, abdominal and thoracic is also fine. The head skeleton is missing (very little to no acron) Head region is also much smaller even though the head forms not that close to the anterior end. So there is something at the anterior pole that is not only important for making the structures there, but also the activity of the entire anterior half of the embryo. Bicaudal: there"s something in the posterior cytoplasm that specifies the posterior structure and if you ectopically inject it somewhere else, we will get posterior structures, reversed polarity, anterior-most region is in the centre of the embryo.
