Archive image from page 29 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 ? „ tj>HjF~_J;y__ ~ Fig, 6. Blastomere nuclei of Ascaris megalocephala, showing the evolution of a single spiral thread from each telophase chromosome, and its reappearance as the prophase chromosome of the following mitosis. (After Bonnevie, , 1908.) A, B, telophase ; C, resting nucleus ; D, prophase. by all the chromosomes become indistinguishably merged into one another, forming a ' network of networks,' which is the consti
Archive image from page 29 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar Year: 1920 ? „ tj>HjF~_J;y__ ~ Fig, 6. Blastomere nuclei of Ascaris megalocephala, showing the evolution of a single spiral thread from each telophase chromosome, and its reappearance as the prophase chromosome of the following mitosis. (After Bonnevie, , 1908.) A, B, telophase ; C, resting nucleus ; D, prophase. by all the chromosomes become indistinguishably merged into one another, forming a ' network of networks,' which is the constitution of the resting nucleus. In the prophase a reverse process takes place, each chromosomal spongework becoming concentrated first into a spongy band, and then into a homogeneous thread. Division of the chromo- somes into daughter chromosomes takes place in prophase. [Van Beneden and Neyt {iS8y), Ascaris ; Boveri {igog), Ascaris ; Kowalski (1904), Salamandra (Fig. 7) ; Gregoire (1906), Allium (Fig. 8).] (2) The telophase metamorphosis consists essentially in the formation of long threads from the chromosomes; the reticulum of the resting 1 For the abbreviations used in references to certain journals, see p. 217.
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