. The cell in development and inheritance. Cells. Fig. 92. — Maturation and fertilization of the egg of the mouse. [SOBOTTA.] A. The ovarian egg still surrounded by the follicle-cells and the membrane { zona pel- lucida) ; the polar spindle formed. B. Egg immediately after entrance of the spermatozoon (sperm-nucleus at cf). C. The two germ-nuclei {g, 9) still unequal; polar bodies above. D. Germ-nuclei approaching, of equal size. E. The chromosomes forming. F. The minute cleavage-spindle in the centre ; on either side the paternal and maternal groups of chromosomes. as in the ordinary mito
. The cell in development and inheritance. Cells. Fig. 92. — Maturation and fertilization of the egg of the mouse. [SOBOTTA.] A. The ovarian egg still surrounded by the follicle-cells and the membrane { zona pel- lucida) ; the polar spindle formed. B. Egg immediately after entrance of the spermatozoon (sperm-nucleus at cf). C. The two germ-nuclei {g, 9) still unequal; polar bodies above. D. Germ-nuclei approaching, of equal size. E. The chromosomes forming. F. The minute cleavage-spindle in the centre ; on either side the paternal and maternal groups of chromosomes. as in the ordinary mitosis of tissue-cells, and its mode of origin there- fore involves the same questions as those already discussed at page 72. It is quite otherwise with the centrosomes at the astral centres, the. 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
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectcells, bookyear1906
