BIO SCI 93 Chapter Notes -Morphogen, Homeobox, Skeletal Muscle

• School: UC-Irvine
• Department: Biological Sciences
• Course: BIO SCI 93
• Professor: Diane O' Dowd

Document Summary

Differential gene expression different cell types in a multicellular organism. Zygote organism: structure and function: cell division, cell differentiation, and morphogenesis. Cells undergo cell differentiation- the process by which cells become specialized in: morphogenesis- the physical processes that give an organism its shape. Cells are not randomly distributed but organized into tissues. Activities of a cell depend on the gene it expresses and the proteins it produces. Two sources of information tell a cell which genes to express at any given time during embryonic development: 1. Cytoplasm of unfertilized egg is not homogenous: cytoplasmic determinants spread unevenly throughout and, environment around a particular cell influence the course of early development. Signals impinging on an embryonic cell from other embryonic cells in the vicinity. Induction- when such signals cause changes in the target cells. Interactions between embryonic cells help induce differentiation of the many specialized cell types making up a new organism. Sequential regulation of gene expression during cellular differentiation.