. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIGS. 7 and 8. Anopheles punctipennis, resting spermatogonia. X =the hetero- chromosome. FIG. 9. Synizesis stage. FIGS. 10-12. Growth stages. FIG. 13. Prophase. heterochromosome appears as a deeply staining mass of chromatin resting against a ball of paler chromatin threads. The corre- sponding stage in Culex ('10, Figs. 12 and 13) showed a ball of chromatin thread wound about a plasmosome. In the later growth stages of the spermatocytes of Anopheles, the heterochro- mosome pair assumes a great diversity of forms. Occasional
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. FIGS. 7 and 8. Anopheles punctipennis, resting spermatogonia. X =the hetero- chromosome. FIG. 9. Synizesis stage. FIGS. 10-12. Growth stages. FIG. 13. Prophase. heterochromosome appears as a deeply staining mass of chromatin resting against a ball of paler chromatin threads. The corre- sponding stage in Culex ('10, Figs. 12 and 13) showed a ball of chromatin thread wound about a plasmosome. In the later growth stages of the spermatocytes of Anopheles, the heterochro- mosome pair assumes a great diversity of forms. Occasionally, especially in early stages, the unequal ends of the pair only are fully condensed as shown in Fig. 10, which is a tangential section of the nucleus. Fig. 11 shows a late spireme stage with hetero- chromosome (x), plasmosome (p~) and parts of a pale spireme. Fig. 12 is a late growth stage taken from a cyst where the cells were mostly in metaphase of the first spermatocyte mitosis; here the heterochromosome pair shows nothing of its composite. 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 Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
