. The beginnings of embryonic development : A symposium organized by the Section on Zoological Sciences of the American Association for the Advancement of Science, cosponsored by the American Society of Zoologists and the Association of Southeastern Biologists, and presented at the Atlanta meeting, December 27, 1955. Embryology. FUSION NUCLEUS AND PRONUCLEUS CLEAVAGE X PERIPHERAL MIGRATION YOLK PHAGOCYTE FORMATION Fig. 5. Diagrammatic representation of nuclear activities during meiosis, nuclear cleavage, and peripheral migration in the Habrohracon egg. now resides in the uterine sac, and the o
. The beginnings of embryonic development : A symposium organized by the Section on Zoological Sciences of the American Association for the Advancement of Science, cosponsored by the American Society of Zoologists and the Association of Southeastern Biologists, and presented at the Atlanta meeting, December 27, 1955. Embryology. FUSION NUCLEUS AND PRONUCLEUS CLEAVAGE X PERIPHERAL MIGRATION YOLK PHAGOCYTE FORMATION Fig. 5. Diagrammatic representation of nuclear activities during meiosis, nuclear cleavage, and peripheral migration in the Habrohracon egg. now resides in the uterine sac, and the oocyte nucleus proceeds through diakinesis and metaphase. Meiosis is blocked at late metaphase or early anaphase of the first meiotic division, and the egg is ready to be oviposited. The egg is 600 microns long and 150 microns across at its widest place. It is concave-convex in shape and the anterior end of the embryo is the widest. The egg is positioned at least par- tially in accordance with the orientation law of Hallez (1886), that is, with the anterior end of the future embryo pointing to- ward the anterior end of the mother while residing in the uterine. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original American Association for the Advancement of Science. Section on Zoological Sciences; Tyler, Albert, 1906-. Washington
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Keywords: ., bookcentury1900, bookpublisherwashington, booksubjectembryology
