In the two patients with , although variable percentages of XXY (88.5 and 28.3%) could be found in the pre-meiotic stages, none of the abnormal entered meiosis, and all were XY. However, the abnormal testicular environment of these patients probably resulted in meiotic I non-disjunction, and...
At the (3′) end, you'll turn to meiosis 来自 国家科技图书文献中心 喜欢 0 阅读量: 22 作者:A Moldón,J Ayté 摘要: Many cellular fates are determined by different genetic programs, but the regulation of cellular differentiation is still not well understood. Besides the possible control ...
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but shes the one my h but simultaneously al but since coming here but since meiosis sta but smaller families but so much left that but so what but speaking of gemin but still but still i cant find but still just wait but still my heart is but still retains its but stranded sexual d ...
of the cell by attaching to the fibers of the cell spindle. The pairs of chromatids then separate, each strand of a pair moving to an opposite end of the cell. When a new membrane forms around each of the two groups of chromosomes, division of the nucleus is complete. The four main ...
At the end of meiosis tetrads of diploid pollen grains are formed. Failure of wall formation.—In other cases the spindle at pre-meiotic mitosis fails only in regard to wall formation. This is evident from cells which enter meiosis with two diploid nuclei in each (plate, fig. 3). Such ...
K. et al. The Ter mutation in the dead end gene causes germ cell loss and testicular germ cell tumours. Nature 435, 360–364 (2005). References 272 and 278 illustrate that modifier genes can have a robust influence on phenotypic outcomes. CAS PubMed PubMed Central Google Scholar ...
The green signal in the middle of X+4 has switched its location to the distal end of 1p+4 as a result of the inversion (Figure 1b). Because no inversion loop has been detected during meiosis of male black muntjacs [24], the whole 1p+4 should remain heterosynaptic except for the two...
That is, the ‘partisan’ interests of a linked suppressor are effectively stronger than the ‘parliamentary’ interests of an unlinked suppressor only if drive is sufficiently weak. This threshold value of δ is especially relevant since, when drive is limited to the meiosis of one sex (as it...
During meiotic prophase I, telomeres attach to and move on the nuclear envelope (NE), regulating chromosome movement to promote homologous pairing. Meiosis-specific proteins TERB1, TERB2 and MAJIN play a key role in this process. Here, we report the crys