. The cell in development and inheritance. Cells. C D Fig. 147. — Hybrid fertilization of the egg ol Ascaris megalocephala, var. bivalens, by the sper- matozoon of var. univalens. [Herla.] A. The germ-nuclei shortly before union. B. The cleavage-figure forming; the sperm-nucleus has given rise to one chromosome (cf), the egg-nucleus to two (?). C. Two-cell stage dividing, showing the three chromosomes in each cell. D. Twelve-cell stage, with the three distinct chro- mosomes still shown in the primordial germ-cell or stem-cell. uality " of chromosomes. But this verbal difficulty should not
. The cell in development and inheritance. Cells. C D Fig. 147. — Hybrid fertilization of the egg ol Ascaris megalocephala, var. bivalens, by the sper- matozoon of var. univalens. [Herla.] A. The germ-nuclei shortly before union. B. The cleavage-figure forming; the sperm-nucleus has given rise to one chromosome (cf), the egg-nucleus to two (?). C. Two-cell stage dividing, showing the three chromosomes in each cell. D. Twelve-cell stage, with the three distinct chro- mosomes still shown in the primordial germ-cell or stem-cell. uality " of chromosomes. But this verbal difficulty should not blind us to the extraordinary interest and significance of the facts. It is difficult to suppose that the tendency of the chromatin to resolve itself into a particular number of chromosomes is directly due to its chemical or molecular structure, or is analogous to crystallization ; for in the chromatin of the same species, or even in that of the same Q^^g, this tendency varies, not with chemical, but with purely morphological. 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, bookdecade1910, booksubjectcells, bookyear1911
