a sequence of cell divisions that begins after fertilization is called embryogenesis.
a sequence of cell divisions that begins after fertilization is called embryogenesis.
a sequence of cell divisions that begins after fertilization is called?
embryogenesis
section::::research use.:notable findings.









































the developmental fate of every single somatic cell (959 in the adult hermaphrodite; 1031 in the adult male) has been mapped. these patterns of cell lineage are largely invariant between individuals, whereas in mammals, cell development is more dependent on cellular cues from the embryo.









































as mentioned previously, the first cell divisions of early embryogenesis in "c. elegans" are among the best understood examples of asymmetric cell divisions, and the worm is a very popular model system for studying developmental biology.
caenorhabditis elegans
other important mechanisms fall under the category of asymmetric cell divisions, divisions that give rise to daughter cells with distinct developmental fates. asymmetric cell divisions can occur because of asymmetrically expressed maternal cytoplasmic determinants or because of signaling. in the former mechanism, distinct daughter cells are created during cytokinesis because of an uneven distribution of regulatory molecules in the parent cell; the distinct cytoplasm that each daughter cell inherits results in a distinct pattern of differentiation for each daughter cell. a well-studied example of pattern formation by asymmetric divisions is body axis patterning in drosophila. rna molecules are an important type of intracellular differentiation control signal. the molecular and genetic basis of asymmetric cell divisions has also been studied in green algae of the genus "volvox", a model system for studying how unicellular organisms can evolve into multicellular organisms. in "volvox carteri", the 16 cells in the anterior hemisphere of a 32-cell embryo divide asymmetrically, each producing one large and one small daughter cell. the size of the cell at the end of all cell divisions determines whether it becomes a specialized germ or somatic cell.
cellular differentiation