The Structure and Behavior of the Kinetochore During Meiotic Divisions inTrillium KamtschaticumPallas
| Autor: | Hajime Kanazawa, Shunsaku Utsumi |
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| Rok vydání: | 1977 |
| Předmět: | |
| Zdroj: | Caryologia. 30:1-11 |
| ISSN: | 2165-5391 0008-7114 |
| Popis: | SUMMARYThe structure and behavior of the kinetochore during meiotic divisions were observed in microsporocytes of Trillium kamtschaticum using the acetocarmine squash method. The kinetochore region assumes a drumstick shape throughout metaphase-I to metaphase-II, and it consists of (1) the spherule, which has been referred to as the kinetochore, and (2) the chromonematic fibers, which connect the kinetochore with both arms of the chromosome. At metaphase-I the kinetochore region is stretched out on both sides of the bivalent. At this stage two adjacent kinetochores can be seen in each homologue, evidently representing the two sister kinetochores organized by the underlying duplicated chromatids. The sister kinetochores remain closely associated throughout anaphase-I to telophase-I, lying on the same side of each homologue. At metaphase-II the kinetochore region is again stretched out from the chromosome (dyad), and at this time the sister kinetochores still lie on the same side of the dyad. Thereafter, th... |
| Databáze: | OpenAIRE |
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