{"id":138058,"date":"2014-02-11T08:00:15","date_gmt":"2014-02-11T06:00:15","guid":{"rendered":"http:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/?p=138058"},"modified":"2014-01-15T17:32:51","modified_gmt":"2014-01-15T15:32:51","slug":"razones-variaciones-y-equivocaciones-en-el-parrafo-cuadrigentesimo-septuagesimo-tercero-de-el-origen-de-las-especies","status":"publish","type":"post","link":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/2014\/02\/11\/138058","title":{"rendered":"Razones, variaciones y equivocaciones en el p\u00e1rrafo cuadrigent\u00e9simo septuag\u00e9simo tercero de El Origen de las Especies"},"content":{"rendered":"<p><strong>Se equivoca el autor al decir:<\/strong><\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<p><em>But the fertility of first crosses is likewise innately variable;<\/em><\/p>\n<p>&nbsp;<\/p>\n<p><em>Pero la fecundidad del primer cruzamiento es tambi\u00e9n, por naturaleza, variable,<\/em><\/p>\n<p>&nbsp;<\/p>\n<p>En la mayor\u00eda de los casos, la esterilidad es invariable, como comprobar\u00e1 quien lea el siguiente p\u00e1rrafo.<\/p>\n<p>&nbsp;<\/p>\n<p><strong>\u00a0<\/strong><\/p>\n<p><em>\u00a0<\/em><\/p>\n<p style=\"text-align: justify;\"><em>\u00a0<\/em><\/p>\n<p style=\"text-align: justify;\"><em>\u00a0<\/em><\/p>\n<p style=\"text-align: justify;\"><em>\u00a0<\/em><\/p>\n<p style=\"text-align: justify;\"><em>473<\/em><\/p>\n<p style=\"text-align: justify;\"><em>The fertility, both of first crosses and of hybrids, is more easily affected by unfavourable conditions, than is that of pure species. But the fertility of first crosses is likewise innately variable; for it is not always the same in degree when the same two species are crossed under the same circumstances; it depends in part upon the constitution of the individuals which happen to have been chosen for the experiment. So it is with hybrids, for their degree of fertility is often found to differ greatly in the several individuals raised from seed out of the same capsule and exposed to the same conditions.<\/em><\/p>\n<p style=\"text-align: justify;\"><em>\u00a0<\/em><\/p>\n<p style=\"text-align: justify;\"><em>\u00a0<\/em><\/p>\n<p style=\"text-align: justify;\"><em>La fecundidad, tanto en los primeros cruzamientos como en los h\u00edbridos, es influida por las condiciones desfavorables m\u00e1s f\u00e1cilmente que en las especies puras. Pero la fecundidad del primer cruzamiento es tambi\u00e9n, por naturaleza, variable, pues no es siempre de igual grado cuando las dos mismas especies se cruzan en las mismas circunstancias: depende, en parte, de la constituci\u00f3n de los individuos que ocurre que han sido elegidos para el experimento. Lo mismo sucede con los h\u00edbridos, pues se ve con frecuencia que su grado de fecundidad difiere mucho en los varios individuos procedentes de semillas del mismo fruto y sometidos a las mismas condiciones.<\/em><\/p>\n<p>&nbsp;<\/p>\n<p>Lectura aconsejada:<\/p>\n<ul>\n<li><a href=\"https:\/\/digital.csic.es\/handle\/10261\/76630\"> Manual para detectar la impostura cient\u00edfica: Examen del libro de Darwin por Flourens.<\/a> Digital CSIC, 2013. 225 p\u00e1ginas.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Se equivoca el autor al decir: \u00a0 But the fertility of first crosses is likewise innately variable; &nbsp; Pero la fecundidad del primer cruzamiento es tambi\u00e9n, por naturaleza, variable, &nbsp; En la mayor\u00eda de los casos, la esterilidad es invariable, como comprobar\u00e1 quien lea el siguiente p\u00e1rrafo. &nbsp; \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 473 The fertility, both of first crosses and of hybrids, is more easily affected by unfavourable conditions, than is that of pure species. But the fertility of first crosses is likewise innately variable; for it is not always the same in degree when the same two species\u2026<\/p>\n","protected":false},"author":86,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0},"categories":[467,22601],"tags":[14334],"blocksy_meta":{"styles_descriptor":{"styles":{"desktop":"","tablet":"","mobile":""},"google_fonts":[],"version":4}},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts\/138058"}],"collection":[{"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/users\/86"}],"replies":[{"embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/comments?post=138058"}],"version-history":[{"count":2,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts\/138058\/revisions"}],"predecessor-version":[{"id":138062,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/posts\/138058\/revisions\/138062"}],"wp:attachment":[{"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/media?parent=138058"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/categories?post=138058"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.madrimasd.org\/blogs\/biologia_pensamiento\/wp-json\/wp\/v2\/tags?post=138058"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}