. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CHROMOSOME GROUP IN BRACHYSTOLA MAGNA. 33 the preceding telophase, but instead of exhibiting a longitudinal split they arc seen to be composed of two equal limbs joined together at one end only (Fig. 9) just as illicit they passed to the pole in the previous anaphases. The division occurs at the point of junction of the two limbs and is unquestionably transverse — separating' the tivo chromosomes at the point where they fused in synopsis two generations before. In those secondary spermatocytes in which the accessory chro- mo
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CHROMOSOME GROUP IN BRACHYSTOLA MAGNA. 33 the preceding telophase, but instead of exhibiting a longitudinal split they arc seen to be composed of two equal limbs joined together at one end only (Fig. 9) just as illicit they passed to the pole in the previous anaphases. The division occurs at the point of junction of the two limbs and is unquestionably transverse — separating' the tivo chromosomes at the point where they fused in synopsis two generations before. In those secondary spermatocytes in which the accessory chro- mosome occurs, this element also divides, but in the line of the longitudinal split which has persisted from the prophases of the primary generation. One half of the resulting spermatids, there- fore, are characterized by the presence of the accessory and the other half by its absence, but this constitutes the only mor- phological difference between the two categories. In each, the ordinary chromosomes may be seen to constitute a graded series of eleven members in which a considerable gap at one point separates a subgroup of three small units from another sub- FIG. 10. FIG. 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
