X Chromosome
Sex chromosome differentiation in Belostoma (Insecta: Heteroptera: Belostomatidae)
Authors: V.B. Bardella, A.L. Dias, L. Giuliano-Caetano, J.R.I. Ribeiro and R. Da Rosa
Belostoma, a genus of the family Belostomatidae, includes species of great ecological importance as biocontrol agents. Few species of these species have been the subject of cytogenetic analyses. Karyotypic evolution in this genus involves agmatoploidy and simploidy; there are also different sex chromosome systems. We examined two Belostoma species (B. dil.. Read More»
- Genet. Mol. Res. 11(3):
- 2012.May.21.2
- DOI:
- 10.4238/2012.May.21.2
Characterization of allele-specific expression of the X-linked gene MAO-A in trophectoderm cells of bovine embryos produced by somatic cell nuclear transfer
Authors: A.R. Ferreira, L.F.C. Aguiar Filho, R.V. Sousa, R. Sartori and M.M. Franco
Somatic cell nuclear transfer (SCNT) may affect epigenetic mechanisms and alter the expression of genes related to embryo development and X chromosome inactivation (XCI). We characterized allele-specific expression of the X-linked gene monoamine oxidase type A (MAO-A) in the trophectoderm (TF) of embryos produced by SCNT. Tota.. Read More»
- Genet. Mol. Res. 14(4):
- 2015.October.5.26
- DOI:
- 10.4238/2015.October.5.26
Molecular sexing of unusually large numbers of Spheniscus magellanicus (Spheniscidae) washed ashore along the Brazilian coast in 2008
Authors: E.C. Reis, R.M. Aires, J.F. Moura, C.A.R. Matias, M. Tavares, P.H. Ott, S. Siciliano and G. L�´bo-Hajdu
There have been few studies on Magellanic penguins (Spheniscus magellanicus). In 2008, these penguins washed ashore along the Brazilian coast in unusually high numbers, some reaching as far as northeast Brazil. As Magellanic penguins show little sexual dimorphism, sex determination by morphological features is not accurate. He.. Read More»
- Genet. Mol. Res. 10(4):
The influence of parental origin of X chromosome genes on the stature of patients with 45 X Turner syndrome
Authors: Kochi C, Longui CA, Lemos-Marini SHV, Guerra-Junior G, Melo MB, Calliari LEP and Monte O
Thirty-seven 45 X Turner syndrome patients with confirmed peripheral blood lymphocyte karyotype were initially selected to determine the origin of the retained X chromosome and to correlate it with their parents’ stature. Blood samples were available in 25 families. The parental origin of the X chromosome was determined .. Read More»
- Genet. Mol. Res. 6(1):
A novel polymorphic Alu insertion embedded in a LINE 1 retrotransposon in the human X chromosome (DXS225): identification and worldwide population study
Authors: Rinaldo Wellerson Pereira, Simone Silva dos Santos and S�©rgio Danilo Junho Pena
We describe a novel polymorphic Alu insertion (DXS225) on the human X chromosome (Xq21.3) embedded into an L1 retrotransposon. The DXS225 polymorphism was genotyped in 684 males from the CEPH Human Genome Diversity Panel. This insertion was found in all regions of the globe, suggesting that it took place before modern humans s.. Read More»
- Genet. Mol. Res. 5(1):
Chromosomal characteristics and karyotype evolution of Oxyopidae spiders (Araneae, Entelegynae)
Authors: L.M. St�¡vale, M.C. Schneider, A.D. Brescovit and D.M. Cella
We made a cytogenetic analysis of four species of Oxyopidae and compared it with the karyotype data of all species of this family. In Hamataliwa sp, the mitotic cells showed 2nâÃ?Â?Ã?Â? = 26+X1X2 and telocentric chromosomes. The 2nâÃ?Â?Ã?Â? = 28, which has been described for only one oxyopid spider, is the highest .. Read More»
- Genet. Mol. Res. 10(2):
- vol10-2gmr1084
- DOI:
- 10.4238/vol10-2gmr1084
Characterization and description of a multiple sex chromosome system in Potamotrygon motoro (Chondrichthyes, Myliobatiformes) from the Paran�¡ River, Argentina
Authors: D.R. Aichino, M.C. Pastori, H.A. Roncati, M.A. Ledesma, A.C. Swar�§a and A.S. Fenocchio
The Potamotrygonidae family represents the only freshwater group of specialized elasmobranchs and is composed of 4 genera: Plesiotrygon, Paratrygon, Potamotrygon, and Heliotrygon. Individuals of Potamotrygon motoro were collected from the Paraná River at Ituzaingó (Province of Corrientes) in Argentina. Mitotic preparations were obtained usin.. Read More»
- Genet. Mol. Res. 12(3):
- 2013.January.16.3
- DOI:
- 10.4238/2013.January.16.3
Chromosomal characteristics of a Brazilian whip spider (Amblypygi) and evolutionary relationships with other arachnid orders
Authors: E. Paula-Neto, D. Araujo, L.S. Carvalho, D.M. Cella and M.C. Schneider
We analyzed mitotic and meiotic cells of a Brazilian amblypygid, Heterophrynus longicornis, using conventional and molecular cytogenetic techniques (Giemsa staining, C-banding, Ag-NOR, and FISH with rDNA probe). This is the first study that focuses solely on amblypygid chromosomes; it was undertaken to add data on cytogenetic knowledge of this group and c.. Read More»
- Genet. Mol. Res. 12(3):
- 2013.September.19.3
- DOI:
- 10.4238/2013.September.19.3