In 1935, Pincus and Enzmann were the first to show that the removal of prophase I arrested rabbit oocytes from their follicular environment resulted in the spontaneous resumption of meiosis (Pincus and Enzmann, 1935). This finding supported a model where the surrounding somatic cells regulated maint...
2-5). The first cell division, meiosis I, is referred to as a “reductive division” because the chromosomal number is reduced to a haploid number in the resulting daughter cells. Here, homologous chromosomes, each comprising two sister chromatids, line up along the equatorial plate during ...
Early prophase in female meiosis of Drosophila melanogaster. Further studies.doi:10.1111/j.1601-5223.1976.tb01548.xLars DvringMargareta SunnerBlackwell Publishing Ltd
cell division. Before prophase begins, the chromosomes duplicate to form two long, thin strands called chromatids. During prophase itself, the chromatids condense and thicken and the membrane surrounding the nucleus disappears. In mitosis, prophase is followed by metaphase. See more atmeiosis,mitosis...
aMean square displacement (MSD) curves for the different meiosis stages computed over short tracks (total duration 2 min). Control MSD (somatic centromeres) are shown in Supplementary Fig.3. Error bars: average ± s.e.m. Numbers of tracks: 130 (leptotene), 96 (zygotene), 99 (pachyten...
Figure 2 DAPI-stained cross-sections of anthers in both the wild-type (A–E) and the TE5A mutant (F–H). (A,F), the early PMC stage; (B,G), the meiosis stage; (C) the dyad stage; (D) the tetrad stage; (E) the microspore stage; (H) the degenerating meiocyte stage. PMC...
The synaptonemal complex (SC) surface-spreading technique was used to visualize the process of chromosome synapsis in spermatocytes and oocytes of E. talpinus Pallas, 1770, a species with the XX sex chromosome system in both males and females. We used el
abnormalities or defects in oocyte meiosis can result in decreased oocyte quality, reduced ovarian reserve, and female diseases. However, the mechanisms of oocyte meiosis remain largely unknown, especially epigenetic regulation. Here, we explored the role of EZH1/2 (histone methyltransferase of H3K27...
The induction of middle meiotic promoters is a key regulatory event in the life cycle of Saccharomyces cerevisiae that controls exit from prophase, meiosis, and spore formation. The Sum1 repressor and Ndt80 activator proteins control middle promoters by binding to overlapping DNA elements. NDT80 is...
What's the difference between mitosis and meiosis?Learn more with our side-by-side comparison. Need to review the different parts of the cell and what they do?We walk you through thefunctions of the cell membrane,endoplasmic reticulum, andvacuoles. If you learn better by looking at the big...