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| Unit 3: Demos |
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Operon Tutorial (optional, but helpful!) Positive v. negative control of prokaryotic gene transcription Transcription of eukaryotic vs. prokaryotic genomes (6c) How Does Methylation Control Synthesis of Proteins? optional: Human
clone produces stem cells ... Or
not? Evidence found that data were fraudulent Yolk content and cleavage in human eggs (15c) Notochord
development (17a) Comparative development (18b) Determinate v. indeterminate cleavage & embryonic induction Unit 3 Slides (accompanying text can be found in your Survival Manual on pages 59-61.) |
Somite Development Somites, sometimes called paraxial mesoderm, are segments or blocks of mesoderm that form lateral to the notochord. Somites are arranged serially along both sides of a developing embryo and each somite can be divided into three regions from lateral to medial - the dermatome, sclerotome, and myotome. The superficial dermatome gives rise to the dermis, the deep layers of the skin. The middle layer, the sclerotome, gives rise to the vertebral column. Finally, the inner-most layer, the myotome, gives rise to skeletal muscles and the bones of the appendages.
Fig. 47-11c from Campbell, 6th ed. Note the somites in the lateral view of the embryo shown above right.
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