Somite

Upon confirming that axial and intercostal tendons originated from the somites, the researchers wanted to determine if the other somitic compartments affected the syndetome fate. Double whole-mount in situ hybridization was used to compare Scx in progenitor cells, Pax1 in sclerotome, and MyoD in myotome. Scx expression was restricted

When you look at different species you see remarkable similarities across the border it is the same when you look at the embryos of different species because of their common ancestors vertebrate embryos have similar stage of development many scientists have studied embryos of multiple species Charles Darwin's book on the origin of species touched on embryonic development. Ernest Hackel also in his book the evolution of men depicted the course of evolution on the phylogeny of humans. Before darwin

An Observation of Development of Danio rerio Principles of Nervous System Development An observation of development of Danio rerio Xenopus laevis and Danio rerio are two models that are extensively used to study early embryonic development, in particular, neurulation. During this practical Danio rerio was used as the model, however the advantages and disadvantages of the use of both models will be discussed herein. Both Xenopus and Zebrafish are excellent model organisms in the study of development

intercostal tendons arose from the somites. To test this previous experiment, researches performed a simple transplant experiment where the presometic mesoderm was replaced of a chick with quail presometic mesoderm and marked using in situ hybridization for Scx and quail-specific antibodies for the quail cells. They observed quail cells in axial and intercostal muscles and tendons, reinforcing the previous experiment that axial and intercostal tendons came from the somites. However, no observations of

While in modern birds, CML originates on the pygostyle if present, since it had been either absent or reduced among most birds. Hemal arches were observed in Sapeornis, but not in Confuciusornis. The formation of the pygostyle alone is to enough to cause abrupt reduction of CML in Confuciusornis and in living birds. Researchers believed the complex functional repertoire of extant bird tails was most likely a result of decoupling of the tail from the hindlimbs, with further adaptations within the

Michelle Coyle 1321264 Bio 2C03 Dr. Dej/Gupta October 5th, 2015 Bio 2C03 Tutorial Assignment 1 1. 1 The title of the research paper that the article on Science Daily was referring to is A Functional SNP in BNC2 Is Associated with Adolescent Idiopathic Scoliosis. Full Citation: Ogura Y, Kou I, Miura S et al. A Functional SNP in BNC2 Is Associated with Adolescent Idiopathic Scoliosis. The American Journal of Human Genetics. 2015; 97(2): 337-342. doi:10.1016/j.ajhg.2015.06.012. 2. The authors decided

The increasing demand for fish in the food industry has resulted in extensive overfishing in wild fisheries. This has caused widespread habitat destruction, overfishing, and an overall loss of biodiversity with both freshwater and marine ecosystems. To compensate for the issues surrounding industrial overfishing of wild populations, farmed fisheries in sheltered coastal waters, rivers, ponds and tanks were introduced. The innovation of genetically modified (GM) farmed-raised fish which possess traits

their migratory path in the trunk which is dictated by somites. Cells which migrate early move ventrally and pass through the anterior half sclerotome, form the sensory ganglia. Cells which are more dorsal within the anterior sclerotome form the sensory neurons and glia of the dorsal root ganglia, partly due to signals which come from the neural tube. Alternatively, the neural crest cells which migrate late travel laterally between the somite and the ectoderm, forming melanocytes in amniotes. It

behavior, habitat, and use of resources as they mature (Dodd 1988). The loggerhead sea turtle life cycle starts with oviposition on the nesting beach. Shortly after oviposition, the neural groove and head fold forms, the amnion arises, and the number of somites increases. As development continues, the heart begins beating, the

* upper limb bud * liver bulge * placodes present * Late in the week = lower limb bud, bigger first pharyngeal arch. * Begin to see stomach Week 6 * Cranial flexure * Cervical flexure * Vertebral discs forming from somites * Dermis is spreading out * 3rd and fouther arch are buried under the skin with the Otic placode * Upper limb bud has fan structure Week 7 * Arches are merging * Mesonephric swelling * Ossification occurs Week 8 * Elbow