Читать книгу Algorithms in Bioinformatics - Paul A. Gagniuc - Страница 49

One of the hypotheses for multicellularity suggests a repeated division of the nucleus within the same unicellular organism and a subsequent formation of membranes in between the nuclei. A reminiscent coenocytic behavior can be seen in multicellular eukaryotic organisms, for instance, in the eggs (0.51 ± 0.003 mm) laid by the well-known Drosophila melanogaster (vinegar fly). The initial stages of the vinegar fly eggs contain multiple nuclei in a common cytoplasmic space (the entire volume of the egg) [143]. Only a few stages of development later, the cell membranes around the floating nuclei start to appear almost simultaneously to constitute the initial cells of the larva [143].