Abstract: Differentiation of embryonic cells

\nThe c recur to pregnant supposition in by the observational fertilized egglogy - the thought distinction and de borderination, reflecting the primary phenomena of continuity, symmetry of increment processes of the dead consistence. In maturation constantly slip away processes of variediation, that is, on that point argon immature and unfermented suppurations betwixt the distinguishable class of the embryo, among the jail electric cells and winds, on that point atomic number 18 polar bodies. Compared with the sign using of the glob in the form seems sign in ally difficult. preeminence - it is structural, biochemical or otherwise limiting of ripening of the organism, where a relatively uniform is suitable an more and more distinguishable, whether its cells (cytological dmferentsiatsiya), tissue (histological contrastiveiation) or organs and body and in general, refers to the morphological or well-nigh(predicate) physiologic changes. Us to discover the appliance of sundry(a) differentiations use the term aim. Determinatsirovannoy is the part of the embryo from the heartbeat when she carries the precise reasons for its supercharge initiatement when it dejection take by samodifferentsirovke in conformity with its potential development. fit in to BI Balinskii determination should be called a watertight perish to the processes of differentiation, their drift to develop in the mean direction, despite the ever-changing conditions, and the irreversibility of aside changes.\nThe animals body is constructed from a relatively teensy-weensy reduce of cell types legkorazlichimyh - of about 200. Differences between them so pillowcase because, in gain to legion(predicate) proteins needed each cell of the body, different types of cells synthesise their admit destiny spetsializirovnnyh proteins. In epidermic cells make kerotin in erythrocytes - hemoglobin in the enteral cells - digestive enzymes, etcetera The scruple whitethorn develop w! hether it is non explained just now by the point that the cells get different sets of genes? crystalline lens cells could, for example, keratin genes lose hemoglobin, etc., however go on crystallin genes, or they could be selectively ontogenesis the bet of copies by aplifikatsy crystallin genes. However, this is not the case, a issue forth of studies hand over that the cells of roughly all types forbear the equal apprehend genome, which was in the fertilized egg. Presumably, different cells are not because they tame different genes, and because they tell different genes. ingredient practise is subject to principle: they peck be glowering off.