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Results

183 814 results (2,415s)

Result

XX/XY system of sex determination in the geophilomorph centipede Strigamia maritima

We show that Strigamia maritima possesses an XX/XY system of sex chromosomes, with males being the heterogametic sex. This is, to our knowledge, the first report of sex chromosomes in any geophilomorph centipede. Using the ...

EB - Genetika a molekulární biologie

  • 2016
  • Jx
  • Link
Result

2D reductions of the equation u_{yy} = u_{tx} + u_{y}u_{xx} - u_{x}u_{xy} and their nonlocal symmetries

We consider the 3D equation u_{yy}= u_{tx} + u_y u_{xx} - u_x u_{xy} and its 2D symmetry reductions: (1) u_{yy} = (u_y + y) u_{xx} - u_{x} u_{xy} - 2 (which is equivalent to the Gibbons-Tsarev equation) and (2) u_{...

Pure mathematics

  • 2017
  • Jimp
  • Link
Result

Symmetry reductions and exact solutions of Lax integrable 3-dimensional systems

hierarchy equation u(yy) = u(z)u(xy)- u(y)u(xz); (2) the 3D rdDym equation u(ty) = u(x)u(xy)- u(y)u(xx); (3) the equation u(ty) = u(t)u(xy)- u(y)u(tx), which we call modified Veronese web equation; (4) Pavlov's eq...

BA - Obecná matematika

  • 2014
  • Jx
  • Link
Result

Escaping the evolutionary trap? Sex chromosome turnover in basilisks and related lizards (Corytophanidae: Squamata)

-studied XX/XY systems, including the green anole, Anolis carolinensis. Corytophanid homologous XX/XY sex chromosomes, syntenic with chicken chromosome 15. Here, we used partially degenerated XX/<...

Biology (theoretical, mathematical, thermal, cryobiology, biological rhythm), Evolutionary biology

  • 2019
  • Jimp
  • Link
Result

Reductions of the Universal Hierarchy and rdDym Equations and Their Symmetry Properties

We consider the equations u_{yy}= u_y u_{xx} - (u_x+ u) u_{xy} + u_x u_y , u_{yy} = (u_x+ x) u_{xy} - (u_{xx} + 2) u_y that arise as reductions of the universal hierarchy and rdDym equations, respectively, and desc...

Pure mathematics

  • 2018
  • Jimp
  • Link
Result

Maleness-on-the-Y (MoY) orchestrates male sex determination in major agricultural fruit fly pests

for male development. Silencing or disruption of MoY in XY embryos causes feminization, whereas overexpression of MoY in XX embryos induces masculinization. Crosses between transformed XY females and XX males give...

Entomology

  • 2019
  • Jimp
  • Link
Result

Chromosomal distribution of interstitial telomeric sequences as signs of evolution through chromosome fusion in six species of the giant water bugs (Hemiptera, Belostoma)

and interstitial telomeric sequences (ITSs) in Belostoma candidulum (2n = 12 + XY/XX, male), B. elongatum (2n = 26 + X1X2Y/X1X1X2X2), B. micantulum (2n = 14 + XY/XX), and B. oxyurum (2n = 6 + XY/XX

Genetics and heredity (medical genetics to be 3)

  • 2017
  • Jimp
  • Link
Result

A molecular approach to the sexing of the triple burial at the Upper Paleolithic site of Dolní Věstonice

Establishing the probability of XX or XY karyotype reveals that all three skeletons from the triple burial at Dolní Věstonice II are male....

AC - Archeologie, antropologie, etnologie

  • 2016
  • Jx
  • Link
Result

Nonlocal Symmetries of Integrable Linearly Degenerate Equations: A Comparative Study

-dimensional equations: (1) the rdDym equation u(ty) = u(x)u(xy) - u(y)u(xx), (2) the Pavlov equation u(yy) = u(tx) + u(y)u(xx) - u(x)u(xy), (3) the universal hierarchy equation u(yy) = u(t)u(xy) - u(y)u(t...

Pure mathematics

  • 2018
  • Jimp
  • Link
Result

Evolution of sex determination systems with heterogametic males and females in Silene

. colpophylla was most probably dioecious. These observations imply that a switch from XX/XY sex determination to a ZZ/ZW system (or vice versa) occurred in the subsection. The results of this study show that the sex-determ...

EB - Genetika a molekulární biologie

  • 2013
  • Jx
  • Link
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