BIOC 212 Lecture Notes - Transactivation, Commissure, Notochord
8 May 2013
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Document Summary
Introduction: there are about 10 million species on earth, researchers have selected model organisms to study all species (i. e. : zebra sh, mouse). These organisms are used to study our cells. Basic process of multicellular organism development: broken down into four basic components, all occur in parallel and without global supervision (occurs due to genetic programming), understanding how the genomic information encodes something so complicated. Proliferation: human gure details visible in human embryo after just 8 weeks. Toes, ngers, most organs and the brain are visible. Until week 38 (around birth), proliferation is mostly what takes place: 8 weeks: ~35 mm (advanced organogenesis). At 38 weeks ~50 cm: adults have 6x1013 cells which originated from a single zygotic cell. Lining up these cells in order would wrap 75 times around the earth: there are ~250 different cell types (i. e. : neurons, muscle cells, adipocytes).
