A type of cell division, occurring in two phases, that reduces the number of chromosomes in reproductive cells to half the original number. It results in the production of reproductive cells (called gametes) in animals and the formation of spores in plants, fungi, and most algae. The first ...
In metazoan oocytes, cell division is asymmetric, resulting in the production of a small polar body plus a large oocyte cell. 4. Meiosis II. During prophase II, the chromosomes recondense and spindle microtubules develop. The sister-chromatid pairs then attach to the spindle in a bipolar ...
The results from oocyte maturation did not show differences on oocyte degeneration, GV, GV breakdown, MI (metaphase I), AI (anaphase I), and TI (telophase I) rates in 24 hr of IVM among experimental groups (Table 2). The effect of ammonium chloride concentration in in vitro maturation cul...
12]. In the presence of insufficient kinetochore-microtubule attachments, the SAC inhibits anaphase onset by the inhibition of APC/C-Cdc20. The SAC recruits checkpoint proteins, including Mad1, Mad2, Bub1, BubR1 (Mad3 in yeast), Bub3 and Mps1, to unattached kinetochores. As...
Non-disjunction of chromosomes during meiosis sometimes results in aneuploidy. What cells are aneuploid? Crossing-over occurs between the four-stranded paired homologous chromosomes during prophase I of meiosis. Why does it not o...
A type of cell division, occurring in two phases, that reduces the number of chromosomes in reproductive cells to half the original number. It results in the production of reproductive cells (called gametes) in animals and the formation of spores in plants, fungi, and most algae. The first ...