Two generations of round spermatids as well as zygotene and pachytene
stages of primary spermatocytes were also observed in this stage.
D) Impairment of meiosis (Impairment of meiosis of male germ cells, arrest in pachytene
of male germ cells);
In oocytes and spermatocytes, the analysis of pachytene
nuclei revealed 29 chromosome pairs in both sexes (Fig.
In control animals GLD-1::GFP has a tightly restricted expression pattern that begins prior to the entry into meiosis, reaches maximal levels during the pachytene
stage (meiotic prophase), and extends to the loop region (diplotene/diakinesis).
The spg are located on the basal membrane; above these, many spcI in different stages of the meiotic prophase from preleptotene, pachytene
, diplotene until diakinesis are easily recognizable according to the aspect of thechromatin.
Germ cells, including spermatogonia, spermatocytes, pachytene
spermatocytes, and round spermatids, were recovered from testes of mice exposed to B[a]P, while mature spermatozoa were isolated from vas deferens.
asynapsis drives meiotic sex chromosome inactivation and leads to substantial postmeiotic repression in spermatids.
Aneuploidies generated after a 24-hr test interval arise from the impairment of late meiotic (late pachytene
and onward) and early embryonic processes, whereas the 65-hr interval captures aneuploidies originating from the disruption of any mitotic and meiotic events in the germline in addition to early embryonic stages.
pairing in relation to pollen fertility in tive cultivars of Cassava.
miR-34c has been identified to be produced specifically in germ cells and is produced mainly in the late stages of meiosis (pachytene
spermatocytes and round spermatids) (29, 30).
(46) FSH is responsible for the development and differentiation of spermatogonia through different stages namely spermatogonia, preleptotene, leptotene, early pachytene
, late pachytene
, and secondary spermatocytes after the attainment of puberty.
chromosome maps of human chromosomes 19 and 20.