. The cell in development and inheritance. Cells. \ \^vl^'^C^^.i! V I// A//. Fig. 99. — Fertilization in an annelid (armed Gephyrean), Thalassema. [GRIFFIN.] A. Second polar body forming; sperm-nucleus and centrosome below. B. Approach of the egg-nucleus and sperm-nucleus, the latter accompanied by the sperm-amphiaster. C. Union of the nuclei. D. Later stage of last. E. Prophase of cleavage-spindle. F. Anaphase of the same ; centrosome divided. G. H. I. Successive stages in the nuclear reconstitution and formation of the daughter-amphiasters for the second cleavage. J. Two-cell stage. in the t
. The cell in development and inheritance. Cells. \ \^vl^'^C^^.i! V I// A//. Fig. 99. — Fertilization in an annelid (armed Gephyrean), Thalassema. [GRIFFIN.] A. Second polar body forming; sperm-nucleus and centrosome below. B. Approach of the egg-nucleus and sperm-nucleus, the latter accompanied by the sperm-amphiaster. C. Union of the nuclei. D. Later stage of last. E. Prophase of cleavage-spindle. F. Anaphase of the same ; centrosome divided. G. H. I. Successive stages in the nuclear reconstitution and formation of the daughter-amphiasters for the second cleavage. J. Two-cell stage. in the trout, in CJuTtoptcrns, and in PJiysa. - In Ascaris division of the centrosome first occurs at a somewhat later period (Figs. 90, 176). If now the centrosomes were indeed permanent cell-organs, we should thus reach the following result: During cleavage the cytoplasm of the blastoniercs is derived from that of the egg, the centrosomes from. 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 Wilson, Edmund B. (Edmund Beecher), 1856-1939. New York Macmillan
Size: 2159px × 1157px
Photo credit: © Library Book Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1900, booksubjectcells, bookyear1906
