. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CHROMOSOME COMPLEX OF SPERMATOCYTES. 315 of the prophase with one of the tetrads occurs. This is brought about by the end to end union of the parts which produces a pentivalent chromosome, or decad. So far as I know no such a chromosome as this has ever before been described. The metaphase exhibits this strikingly peculiar chromosome extended along the length of the spindle parallel to its axis. The terminal parts are variously placed, sometimes being bent back parallel with the middle portion, sometimes extending out at rig
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CHROMOSOME COMPLEX OF SPERMATOCYTES. 315 of the prophase with one of the tetrads occurs. This is brought about by the end to end union of the parts which produces a pentivalent chromosome, or decad. So far as I know no such a chromosome as this has ever before been described. The metaphase exhibits this strikingly peculiar chromosome extended along the length of the spindle parallel to its axis. The terminal parts are variously placed, sometimes being bent back parallel with the middle portion, sometimes extending out at right angles to it, and again being directed upward at an obtuse angle. Frequently the two terminal elements are differently inclined to the middle portion. In any event the archo- plasmic fibers attach, not at the free ends of these chromosomes, but where their other ends join the. FIG. 10. Lateral view of some of the chromosomes in the metaphase of a spermatogonium of Mermi^ia. The multiple chromosome shows its tetrad character 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
