WebbWhen polyspermic starfish oocytes inseminated at the GV stage are induced to mature, they apparently accomplish meiosis I normally, because breakdown of the germinal vesicle and the first polar body (PB1) emission occurred with a timing similar to unfertilized oocytes (see Fig. 4). WebbUnequal cell division regulated by the contents of germinal vesicles Ri-ko Matsuuraa,b and Kazuyoshi Chibaa,b,* aDepartment of Biology, Ochanomizu University, 2-1-1 Ohtsuka, Bunkyo, Tokyo 112-8610, Japan bTateyama Marine Laboratory, Ochanomizu University, 11 Kou-yatsu, Tateyama, Chiba 294-0301, Japan Received for publication 1 December 2003, …
Thirty years of calcium signals at fertilization - ScienceDirect
WebbIntroduction. The ultrastructure of the human mature metaphase-II oocyte before and after the cortical reaction has been previously described. However, we found a new vesicular aggregate associated with smooth endoplasmic reticulum tubular aggregates (aSERT) and new observations regarding the cortical reaction. WebbThe Biodiversity Heritage Library works collaboratively to make biodiversity literature openly available to the world as part of a global biodiversity community. mリーグ 牌譜 データ
Cytoplasmic regionalization in starfish oocyte occurrence and ...
WebbComparison of maturing and immature ova indicate that germinal vesicle-contain-ing oocytes (immature) are capable of undergoing a cortical granule reaction mor … WebbDescribe the formation of polar bodies in the starfish and compare it to the formation of polar bodies in the mammals. (please list any references, if used) Thank you for your help! :) Developmental biology question: 1. Would an oocyte with a germinal vesicle have polar bodies? Please explain. 2. Describe the formation of polar bodies in the ... Webb19 juni 2024 · The mechanism of serotonin (5-HT)-induced oocyte germinal vesicle breakdown (GVBD) in the mud crab, Scylla paramamosain, was investigated in this study. Histological staining showed that there were two meiotic arrests in oocyte, appearing at prophase I and metaphase I. This result indicated that meiosis I arrest at prophase I in S. … mリーグ 見逃し配信 いつ