BIO 124 Chapter 16: Chapter 16 Notes
16 Mar 2016
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The development of a fertilized egg into an adult requires a precisely regulated program of gene expression. Understanding this program has progressed mainly by studying model organisms. Stem cells are key to the developmental process. Orchestrating proper gene expression by all cells is crucial for life. 16. 1 a program of differential gene expression leads to the different cell types in a multicellular. A fertilized egg gives rise to many different cell types. Cell types are organized successively into tissues, organs, organ systems, and the whole organism. Gene expression orchestrates the developmental programs of animals. The transformation from zygote to adult results from cell division, cell differentiation, and morphogenesis. Cell differentiation is the process by which cells become specialized in structure and function. The physical processes that give an organism its shape constitute morphogenesis. Differential gene expression results from genes being regulated differently in each cell type.
