Titlebook: Developmental Biology; Werner A. Müller Textbook 1997 Springer-Verlag New York, Inc. 1997 Regeneration.Vertebrate.development.developmenta

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grounded

Solutions of Linear Systems of Equations,oundaries: fertilization and death. Sperm cells and egg cells are not capable of starting an independent life on their own. Once released from the testes or the ovary, the lifetime of sperm cells and egg cells is restricted to a few minutes or hours. Only the fusion of sperm and egg results in a cel

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Harry Stack Sullivan (1892–1949)ical and complete strands of DNA are apportioned to both daughter cells. Initially, the cells of an embryo have .: each cell is thought to have the same genome as every other cell and therefore is capable in principle of becoming any cell type. All cells are believed to be . and ., and experiments w

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Harry Stack Sullivan (1892–1949)y must jointly produce an element of the skeleton giving it a distinct shape, and at that place they must commit suicide to create a cavity. How do cells know where they are? Do their genes somehow tell them what their position is at each moment? This is not possible, for the DNA of the nucleus does

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https://doi.org/10.1007/978-0-387-88455-4es of mitoses. If developing systems follow traditional textbooks and undergo nothing but regular mitotic divisions, the genomic information of all cells is identical as long as nothing is changed after DNA replication. In fact, initial genomic equivalence appears to occur for the vast majority of e

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https://doi.org/10.1007/b139084nd swarming (Fig. 3–38). In an avian and a mammalian blastodisc the cells of the meso “derm” do not form a “skin” (Greek: . = skin) or a coherent germ “layer”; instead, the mesodermal cells creep around like amoebae to colonize the spaces between the epiblast and the hypoblast (Fig. 3–39, 3–48). Whe