{"id":76928,"date":"2018-03-09T23:22:24","date_gmt":"2018-03-09T23:22:24","guid":{"rendered":"https:\/\/www.deberes.net\/tesis\/sin-categoria\/estructura-y-dinamica-de-la-region-telomerica-en-cromosomas-meioticos-de-raton\/"},"modified":"2018-03-09T23:22:24","modified_gmt":"2018-03-09T23:22:24","slug":"estructura-y-dinamica-de-la-region-telomerica-en-cromosomas-meioticos-de-raton","status":"publish","type":"post","link":"https:\/\/www.deberes.net\/tesis\/ciencias-de-la-vida\/estructura-y-dinamica-de-la-region-telomerica-en-cromosomas-meioticos-de-raton\/","title":{"rendered":"Estructura y din\u00e1mica de la regi\u00f3n telom\u00e9rica en cromosomas mei\u00f3ticos de rat\u00f3n"},"content":{"rendered":"<h2>Tesis doctoral de <strong> Alberto Viera Vicario <\/strong><\/h2>\n<p>Desde un punto de vista citol\u00f3gico el t\u00e9rmino \u00abtel\u00f3mero\u00bb se utiliza para definir el extremo f\u00edsico de los cromosomas lineares de los organismos eucariotas. En este dominio cromos\u00f3mico est\u00e1 contenido el adn telom\u00e9rico, en mam\u00edferos constituido por un n\u00famero variable de repeticiones en tandem de la secuencia ttaggg, as\u00ed como diversas prote\u00ednas espec\u00edficas asociadas conformando los denominados \u00abcomplejos telom\u00e9ricos\u00bb.  en la presente tesis se ha tratado de contribuir no s\u00f3lo al conocimiento de la  estructura, composici\u00f3n y localizaci\u00f3n de los  complejos telom\u00e9ricos durante la meiosis, sino tambi\u00e9n aportar nuevos datos relativos a los cambios morfofuncionales que \u00e9stos experimentan durante las dos divisiones mei\u00f3ticas. el modelo experimental utilizado ha sido el rat\u00f3n de laboratorio (mus musculus) por presentar todos los cromosomas teloc\u00e9ntricos, es decir, en el extremo centrom\u00e9rico de todos los cromosomas los complejos telom\u00e9ricos proximales se hallan inmersos en las regiones de heterocromatina centrom\u00e9rica. Esta peculiaridad ha hecho que \u00e9sta sea una especie de elecci\u00f3n por la particular conformaci\u00f3n que durante la primera divisi\u00f3n mei\u00f3tica deben presenta las regiones centrom\u00e9ricas de este tipo de cromosomas. As\u00ed, en metafase i los cinetocoros hermanos se deben orientar a un mismo polo celular, por lo que la presencia de los complejos telom\u00e9ricos en estas regiones supondr\u00eda un impedimento est\u00e9rico para la correcta interacci\u00f3n de los microt\u00fabulos del huso con los cinetocoros.  se ha pretendido detectar y analizar las posibles diferencias en la longitud de las repeticiones telom\u00e9ricas en cromosomas condensados durante las dos divisiones mei\u00f3ticas de machos de rat\u00f3n mediante hibridaci\u00f3n in situ fluorescente (fish) con una sonda telom\u00e9rica (c3ta2)3 p\u00e9ptidonucleica (pna). Los reultados demuestran heterogeneidad en el n\u00famero de repeticiones de adn telom\u00e9rico entre los distintos cromosomas del complemen<\/p>\n<p>&nbsp;<\/p>\n<h3>Datos acad\u00e9micos de la tesis doctoral \u00ab<strong>Estructura y din\u00e1mica de la regi\u00f3n telom\u00e9rica en cromosomas mei\u00f3ticos de rat\u00f3n<\/strong>\u00ab<\/h3>\n<ul>\n<li><strong>T\u00edtulo de la tesis:<\/strong>\u00a0 Estructura y din\u00e1mica de la regi\u00f3n telom\u00e9rica en cromosomas mei\u00f3ticos de rat\u00f3n <\/li>\n<li><strong>Autor:<\/strong>\u00a0 Alberto Viera Vicario <\/li>\n<li><strong>Universidad:<\/strong>\u00a0 Aut\u00f3noma de Madrid<\/li>\n<li><strong>Fecha de lectura de la tesis:<\/strong>\u00a0 28\/10\/2005<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n<h3>Direcci\u00f3n y tribunal<\/h3>\n<ul>\n<li><strong>Director de la tesis<\/strong>\n<ul>\n<li>Julio Sanchez Rufas<\/li>\n<\/ul>\n<\/li>\n<li><strong>Tribunal<\/strong>\n<ul>\n<li>Presidente del tribunal: Juan  Luis Santos coloma <\/li>\n<li> Barbero esteban Jos\u00e9 Luis (vocal)<\/li>\n<li>Carlos Garcia de la vega (vocal)<\/li>\n<li>sagrario Ortega jimenez (vocal)<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Tesis doctoral de Alberto Viera Vicario Desde un punto de vista citol\u00f3gico el t\u00e9rmino \u00abtel\u00f3mero\u00bb se utiliza para definir el [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center 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