A surge of late-occurring meiotic double-strand breaks rescues synapsis abnormalities in spermatocytes of mice with hypomorphic expression of SPO11 [PDF]
, 2015 Meiosis is the biological process that, after a cycle of DNA replication, halves the cellular chromosome complement, leading to the formation of haploid gametes.
Barchi, Marco +9 more
core +6 more sources
Chromosome number and meiotic behaviour of two populations of Onobrychis chorassanica Bunge (O. sect. Hymenobrychis) in Iran [PDF]
Journal of Cell and Molecular Research, 2010 The genus Onobrychis belongs to family Fabaceae and has about 130 species throughout the world. Onobrychis sect. Hymenobrychis with nearly 14 species in Iran is one of the important sections of the genus.
Masoud Ranjbar +2 more
doaj +1 more source
Folia Horticulturae, 2021 Pollen characteristics are very important for Iris interspecific hybridisation. In this study, the pollen viability and male meiosis were studied in yellow-flowered Iris dichotoma (Y2), I. domestica (S3) and their hybrids F1, F2 and BC1 (BC1-Y and BC1-S).
Xu Wenji +6 more
doaj +1 more source
LSD1 is essential for oocyte meiotic progression by regulating CDC25B expression in mice [PDF]
, 2015 Mammalian oocytes are arrested at prophase I until puberty when hormonal signals induce the resumption of meiosis I and progression to meiosis II.
Chen, T +8 more
core +1 more source
Evidence of Selection against Complex Mitotic-Origin Aneuploidy during Preimplantation Development. [PDF]
PLoS Genetics, 2015 Whole-chromosome imbalances affect over half of early human embryos and are the leading cause of pregnancy loss. While these errors frequently arise in oocyte meiosis, many such whole-chromosome abnormalities affecting cleavage-stage embryos are the ...
Rajiv C McCoy +7 more
doaj +1 more source
Errors in chromosome segregation during oogenesis and early embryogenesis [PDF]
, 2010 Errors in chromosome segregation occurring during human oogenesis and early embryogenesis are very common. Meiotic chromosome development during oogenesis is subdivided into three distinct phases.
A Dyban +65 more
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Meiotic abnormalities in infertile males
Cytogenetic and Genome Research, 2005 Meiotic anomalies, as reviewed here, are synaptic chromosome abnormalities, limited to germ cells that cannot be detected through the study of the karyotype. Although the importance of synaptic errors has been underestimated for many years, their presence is related to many cases of human male infertility.
Egozcue, Josep +8 more
openaire +3 more sources
“Meiotic abnormality in dominant genic male sterile Brassica napus” [PDF]
Molecular Biology, 2008 Rs1046AB is a dominant genic male sterile (DGMS) Brassica napus line derived from Yi-3A. Until now the molecular mechanism of its male sterility is still unknown. In this paper, cytological observations demonstrated that all cells in sterile plants contained condensed nuclei at the beginning stage of meiosis; this implied that meiotic cells were ...
J. Y. Wu, G. S. Yang
openaire +3 more sources
Effects of 5α-dihydrotestosterone and 17β-estradiol on the mouse ovarian follicle development and oocyte maturation. [PDF]
PLoS ONE, 2014 We have previously reported that androstenedione induces abnormalities of follicle development and oocyte maturation in the mouse ovary. In granulosa cells of the ovarian follicle, androstenedione is aromatized to 17β-estradiol (E2). To determine whether
Wataru Tarumi +2 more
doaj +1 more source
UBR2 of the N-end rule pathway is required for chromosome stability via histone ubiquitylation in spermatocytes and somatic cells [PDF]
, 2012 The N-end rule pathway is a proteolytic system in which its recognition components (N-recognins) recognize destabilizing N-terminal residues of short-lived proteins as an essential element of specific degrons, called N-degrons.
An, JY +12 more
core +1 more source