. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. Fig. 2.— E F ^ Mitosis. A, resting stage. B-D, prophase. E, metaphase. F, anaphase, telophase. H, late telophase returning to resting several pieces. This is the prophase stage. The nuclear wall breaks down when the spireme segments into a number of bodies called "chromo- somes" {C,D). These bodies become arranged in a plate at the equator of a spindle halfway between the centrosomes. In t
. Embryology of insects and myriapods; the developmental history of insects, centipedes, and millepedes from egg desposition [!] to hatching. Embryology -- Insects; Embryology -- Myriapoda. Fig. 2.— E F ^ Mitosis. A, resting stage. B-D, prophase. E, metaphase. F, anaphase, telophase. H, late telophase returning to resting several pieces. This is the prophase stage. The nuclear wall breaks down when the spireme segments into a number of bodies called "chromo- somes" {C,D). These bodies become arranged in a plate at the equator of a spindle halfway between the centrosomes. In the next stage—the metaphase—the chromosomes split in such a manner that each of their parts contains an approximately equal amount of chromatin {E). In the next, or anaphase stage, the chromosomes formed after splitting appear to be drawn along the spindle fibers {F) to the centrosomes. Every chromosome present at the end of the prophase sends half its chromatin to either end of the spindle. The next is a reconstruction stage, or the telophase, wherein the nuclei return to the resting condition {G). The chromatin apparently again becomes scattered through the nucleus; a new nuclear wall is formed; and the cell itself constricts between the nuclei, producing two daughter cells (Fig. 2H). Growth in all animal. 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 Johannsen, O. A. (Oskar Augustus), 1870-1961; Butt, Ferdinand Hinckley, 1899-. New York, London, McGraw-Hill Book Company, inc.
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