. Cytology, with special reference to the metazoan nucleus. Cells. 11 ^y H Fig. 56. The chromosomes of Culex as figured bv different workers, showing the close approximation of homologous chromosomes, (A, B, from Stevens, 'Z., 1910 ; C, from Taylor, , 1915 ; D, E, from Whiting, , 1917 ; F, G., from Hance, , 1917 ; H, I, J, from Metz, , 1916.) A, spermatogomal pro- phase ; only one of the three chromatin threads is visibly double ; B, spermatogonia! metaphase, three pairs of separate chromosomes; C, somatic prophase; D, spermatogonial prophase; E, spermatogonia! anapha
. Cytology, with special reference to the metazoan nucleus. Cells. 11 ^y H Fig. 56. The chromosomes of Culex as figured bv different workers, showing the close approximation of homologous chromosomes, (A, B, from Stevens, 'Z., 1910 ; C, from Taylor, , 1915 ; D, E, from Whiting, , 1917 ; F, G., from Hance, , 1917 ; H, I, J, from Metz, , 1916.) A, spermatogomal pro- phase ; only one of the three chromatin threads is visibly double ; B, spermatogonia! metaphase, three pairs of separate chromosomes; C, somatic prophase; D, spermatogonial prophase; E, spermatogonia! anaphase; F, ovarian (diploid) prophase; G, spermatogonial metaphase; H, I, J, prophase, metaphase, and anaphase of somatic mitoses. complex of this mosquito (where 2n = 6) as depicted by various workers. As will be seen, the homologous chromosomes in prophase (Fig. 56, A, C, D, F, H) are generally intimately apphed to or twisted round one another, quite as closely as are the daughter halves of spUt prophase chromosomes in the somatic mitoses of many other forms (Figs. 3, 8).. 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 Agar, Wilfred Eade, 1882-. London, Macmillan
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectcells, bookyear1920
