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3. MEIOSIS IN THE ANTHERS The chromosome complement as seen in the root tips consists as normally in A ilium ascalonicum of eight pairs of chromosomes of which two pairs—one longer than the other—had median and the rest sub-median centromeres. The latter class included a satellited pair...
But different things occur in each step of mitosis, and each step is crucial to cell division occurring properly. That means successful cell division depends on the precision and regulation ofeachphase of mitosis. That’s why it’s important to be able to understand and articulate the role of...
Sexual reproduction begins with conjugation (i.e. the pairing of two cells of different mating types) and meiosis of the micronucleus in each member of the conjugating pair (Fig. 1A). Eventually, one haploid micronucleus from each cell is transferred to the other cell; the haploid nuclei then...
meiosis of germ cells, there is a crucial difference from themitosisof other cells. In meiosis the two chromatids making up each chromosome remain together, so that whole chromosomes are separated from their homologous partners. Cell division then occurs, followed by a second division thatresembles...
In S. pombe, Erh1 also forms nuclear foci in vegetative cells and these foci seem to be the meiotic mRNA degradation sites which, upon entry into meiosis, converge to the single Mei2 dot [36,37,46]. During mitosis, when the nuclear envelope breaks down, ERH fills the entire human cell...
In conclusion, Cx43 in SCs appears to be required for normal progression of the first wave of spermatogenesis, especially for the mitosis-meiosis switch, and also for the regulation of prepubertal SC maturation. Keywords: Cx43; impaired spermatogenesis; mitosis-meiosis switch; Sertoli cell ...
Altered Prepubertal Sertoli Cell Maturation and Impairment of the Mitosis-Meiosis Switch Erika Hilbold 1, Ottmar Distl 2 , Martina Hoedemaker 3, Sandra Wilkening 3, Rüdiger Behr 4 , Aleksandar Rajkovic 5,6,7, Marion Langeheine 1, Kristina Rode 1, Klaus Jung 2, Julia Metzger 2 and Ralph ...