Archive image from page 53 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar_0 Year: 1920 38 CYTOLOGY CHAP. It is not found, for example, in Tomopteris. Owing to its conspicuous nature and to the fact that it is confined to the meiotic prophase, it early attracted the attention of cytologists, by many of whom it used to be considered diagnostic of the fact that syndesis was in progress. In Fig. 16. Meiosis in Lepidosiren (male). [(Agar, , 1912.) A, resting spermatogonial nucleus; B, C, spermatogonial prophase ; |
Archive image from page 53 of Cytology, with special reference to. Cytology, with special reference to the metazoan nucleus cytologywithspec00agar_0 Year: 1920 38 CYTOLOGY CHAP. It is not found, for example, in Tomopteris. Owing to its conspicuous nature and to the fact that it is confined to the meiotic prophase, it early attracted the attention of cytologists, by many of whom it used to be considered diagnostic of the fact that syndesis was in progress. In Fig. 16. Meiosis in Lepidosiren (male). [(Agar, , 1912.) A, resting spermatogonial nucleus; B, C, spermatogonial prophase ; |D, daughter plate from a spermatogonial anaphase ; E, resting spermatocyte I.; ¥, zygotene; G, pachytene nucleus. consequence of this, the word synapsis proposed by Moore to cover the whole of that period of meiosis in which syndesis occurs, has been applied by many cytologists to its most conspicuous feature alone—namely, the contraction just described. It has been thoroughly established, however, that the contraction of the chromatin has no invariable relation to the
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