{"id":5005348,"date":"2006-02-09T23:34:52","date_gmt":"2006-02-09T22:34:52","guid":{"rendered":"https:\/\/criticalbiomass.blog.hu\/2006\/02\/09\/minimumegymamut"},"modified":"2006-02-09T23:34:52","modified_gmt":"2006-02-09T22:34:52","slug":"minimumegymamut","status":"publish","type":"post","link":"https:\/\/criticalbiomass.hu\/?p=5005348","title":{"rendered":"Minimumegymamut"},"content":{"rendered":"<p><img src=\"http:\/\/criticalbiomass.blog.hu\/media\/image\/200602\/mammut-elefant.jpg\" align=\"left\" hspace=\"5\" vspace=\"3\" width=\"200\"><br \/>\nAkinek esetleg m\u00e9g k\u00e9ts\u00e9gei lettek volna: igen, a mamut val\u00f3ban az elef\u00e1ntok k\u00f6zeli rokona (volt).<br \/>\nEgy lipcsei kutat\u00f3csoport oroszorsz\u00e1gi fagyott mamut-sz\u00f6vetmint\u00e1kb\u00f3l mitokondri\u00e1lis DNS-t izol\u00e1lt (ami, tegy\u00fck hozz\u00f3, egy j\u00f3p\u00e1r ezer \u00e9ve halott \u00e1llat eset\u00e9ben egy\u00e1ltal\u00e1n nem trivi\u00e1lis) \u00e9s ennek alapj\u00e1n vizsg\u00e1lta meg az egykori sz\u0151r\u00f6s \u00f3ri\u00e1s rokons\u00e1gi viszonyait. Az eml\u00edtett DNS az\u00e9rt k\u00fcl\u00f6n\u00f6sen alkalmas erre, mert csak anyai \u00e1gon \u00f6r\u00f6kl\u0151dik, ugyanis a spermiumban b\u00e1r vannak mitokondriumok, azok megterm\u00e9keny\u00edt\u00e9skor nem jutnak be a petesejtbe. Ez\u00e9rt azt\u00e1n&nbsp;nincs kit\u00e9ve a rekombin\u00e1ci\u00f3 &#8220;viszontags\u00e1gainak&#8221; sem (ami a homol\u00f3g kromosz\u00f3m\u00e1kon lev\u0151 DNS-t szokta csereber\u00e9lni), s ez lehet\u0151v\u00e9 teszi, hogy a mut\u00e1ci\u00f3k viszonylag egyenletesen halmoz\u00f3djanak fel benne, ak\u00e1r hosszabb id\u0151n \u00e1t. Ezen tulajdons\u00e1ga miatt a biol\u00f3gusok sz\u00edvesen haszn\u00e1lj\u00e1k egyfajta &#8220;molekul\u00e1ris \u00f3rak\u00e9nt&#8221;, hiszen k\u00e9t faj mitokondri\u00e1lis genomj\u00e1nak k\u00fcl\u00f6nb\u00f6z\u0151s\u00e9ge alapj\u00e1n meg lehet saccolni, hogy a k\u00e9t faj mennyi ideje v\u00e1lt el egym\u00e1st\u00f3l. A mamut, mint az kider\u00fclt, az \u00e1zsiai elef\u00e1ntnak a k\u00f6zelebbi rokona, \u00e9s a k\u00e9t vonal kb. 440 ezer \u00e9ve v\u00e1lt k\u00fcl\u00f6n. <br \/>\nAz, hogy ilyen j\u00f3 min\u0151s\u00e9g\u0171 DNS-t tudtak izol\u00e1lni mindenesetre b\u00edztat\u00f3, \u00edgy nem maradt m\u00e1s h\u00e1tra, mint t\u00fcrelmesen v\u00e1rni az <a href=\"http:\/\/news.bbc.co.uk\/2\/hi\/asia-pacific\/3075381.stm\">els\u0151 kl\u00f3nozott mamutot<\/a>&#8230;<\/p>\n<hr>\n<p><font size=\"1\"><br \/>\n<b>Krause, J., Dear, P.H., Pollack, J.L., Slatkin, M., Spriggs, H., Barnes, I., Lister, A.M., Ebersberger, I., P\u00e4\u00e4bo, S. and Hofreiter, M.<\/b> (2006) Multiplex amplification of the mammoth mitochondrial genome and the evolution of Elephantidae. <i>Nature<\/i> <b>439<\/b>: 724-727<br \/>\n<\/font><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Akinek esetleg m\u00e9g k\u00e9ts\u00e9gei lettek volna: igen, a mamut val\u00f3ban az elef\u00e1ntok k\u00f6zeli rokona (volt). Egy lipcsei kutat\u00f3csoport oroszorsz\u00e1gi fagyott mamut-sz\u00f6vetmint\u00e1kb\u00f3l mitokondri\u00e1lis DNS-t izol\u00e1lt (ami, tegy\u00fck hozz\u00f3, egy j\u00f3p\u00e1r ezer \u00e9ve halott \u00e1llat eset\u00e9ben egy\u00e1ltal\u00e1n nem trivi\u00e1lis) \u00e9s ennek alapj\u00e1n &hellip; <a href=\"https:\/\/criticalbiomass.hu\/?p=5005348\">Egy kattint\u00e1s ide a folytat\u00e1shoz&#8230;. <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1],"tags":[],"_links":{"self":[{"href":"https:\/\/criticalbiomass.hu\/index.php?rest_route=\/wp\/v2\/posts\/5005348"}],"collection":[{"href":"https:\/\/criticalbiomass.hu\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/criticalbiomass.hu\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/criticalbiomass.hu\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/criticalbiomass.hu\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5005348"}],"version-history":[{"count":0,"href":"https:\/\/criticalbiomass.hu\/index.php?rest_route=\/wp\/v2\/posts\/5005348\/revisions"}],"wp:attachment":[{"href":"https:\/\/criticalbiomass.hu\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5005348"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/criticalbiomass.hu\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5005348"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/criticalbiomass.hu\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5005348"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}