BIO SCI 93 Lecture Notes - Lecture 28: Morphogenesis, Mitosis, Myod
2 Dec 2018
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Embryo development of most organisms single celled zygote produce cells of different types, each has different structure and function. Cell types organized into tissues organs organ systems whole organism. Transformation from zygote adult are from cell division, cell differentiation, morphogenesis. Cell differentiation- cells specialize in structure and function. Morphogenesis- physical process that gives organisms its shape https://www. pinterest. com/pin/285063851383951937/ Different gene expression is a result of genes being regulated differently in cell types. Materials in egg set up gene regulation, which is carried out as cells divide. Zygote divides by mitosis, different cytoplasmic determinants lead to different gene expression http://www. sliderbase. com/spitem-1458-10. html. Source of developmental information= environment around the cell. Induction- embryonic cells signal molecules cause changes in transcription in target cells nearby. Interactions between cells induce differentiation of specialized cell types. E. g. signals from nearby embryonic cells http://bio1151. nicerweb. com/locked/media/ch18/induction. html. Differentiation of cells- marked by production of tissue-specific proteins. Myoblasts make muscle-specific proteins, forms skeletal muscle cells.
