XB-IMG-158747
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Figure 6. Schematic Representation of the partial constriction experiment
(A-C) A fertilized egg is constricted such that only half of the embryo inherits a nucleus. The nucleated side divides until a nucleus moves into the uncleaved half of the embryo (D), inducing cleavage to begin in this half(E). By (F), the right side has reached the MBT and begun asynchronous division, whereas the retarded half of the embryo (left) continues to divide synchronously for two more divisions. Image published in: Newport J and Kirschner M (1982) Copyright © 1982. Image reproduced with permission of the Publisher, Elsevier B. V. Larger Image Printer Friendly View |