BSC 1010 Chapter Notes - Chapter 19: Human Embryogenesis, Cellular Differentiation, Pattern Formation
8 Feb 2017
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Document Summary
Development can be defined as the process of systematic, gene-directed changes through which an organism forms the successive stages of its life cycle. Despite differences, most multicellular organisms develop according to molecular mechanisms that are fundamentally very. Cell division: early development involves extensive cell division, but in many cases it does not include much growth as the egg cell itself is quite large. Differentiation: as cells divide, orchestrated changes in gene expression result in differences between cells that ultimately result in cell specialization, human body contains 210 major types of differentiated cells. Pattern formation: cells in a developing embryo must become oriented to the body plan of the organism the embryo will become, pattern formation involves cells" abilities to detect positional information that guides their ultimate fate. Morphogenesis: as development proceeds, the form of the body is generated, may involve cell death as well as cell division & differentiation.
