Now showing items 31-40 of 772
Histone modifications related to chromosome silencing and elimination during male meiosis in Bengalese finch
(Springer Verlag Berlín, 2014-06)
We report here that a germline-restricted chromosome (GRC) is regularly present in males and females of the Bengalese finch (Lonchura domestica). While the GRC is euchromatic in oocytes, in spermatocytes this chromosome ...
Spermatogenesis and karyotypes of three species of water striders (Gerridae, Heteroptera).
Although they are of economic importance, there have been few cytogenetic studies of the Gerridae (Heteroptera) in Brazil. We examined spermatogenesis (meiosis and spermiogenesis) and nucleolar behavior in three species ...
Cytological Identification of Chromosomal Rearrangements in Doritaenopsis and Phalaenopsis
(Journal of International Cooperation (Taiwan) 2(1): 1-11, 2007-09-01)
This study investigated the impact of gross chromosomal rearrangements, specifically translocations and inversions, on the division of pollen mother cells in hybrids Dtps. Queen Beer, Dtps. Sinica Sunday, Dtps. Sweet ...
Spermatogenesis in Triatoma melanocephala (Hemiptera: Triatominae)
Triatoma melanocephala is a rare species of Hemiptera. It belonged to the Brasiliensis subcomplex and presents morphological characteristics very close to those of Triatoma vitticeps. We investigated spermatogenesis of T. ...
SPINDLE MEMBRANES DURING SPERMATOGENESIS IN DERMATOBIA-HOMINIS (DIPTERA, CUTEREBRIDAE)
(Journal Submicroscopic Cytology Pathology, 1995-10-01)
During the mitotic and meiotic division in Dermatobia hominis spermatogenesis, the nuclear envelope is fragmented and membranes appear around the spindle. The membranes surrounding the mitotic spindle are formed by two ...
Nucleolar-persistence phenomenon during spermatogenesis in genus Meccus (Hemiptera, Triatominae)
The Triatominae subfamily consists of 150 species in 18 genera, grouped into six tribes. In cytogenetics, triatomines are important biological models because they have holocentric chromosomes and nucleolar persistence in ...