{"id":21205,"date":"2020-08-18T19:21:46","date_gmt":"2020-08-18T17:21:46","guid":{"rendered":"https:\/\/www.laterredufutur.com\/accueil\/?p=21205"},"modified":"2020-08-18T19:21:46","modified_gmt":"2020-08-18T17:21:46","slug":"ladn-dun-ancien-ancetre-inconnu-est-dans-certains-dentres-nous","status":"publish","type":"post","link":"https:\/\/www.laterredufutur.com\/accueil\/ladn-dun-ancien-ancetre-inconnu-est-dans-certains-dentres-nous\/","title":{"rendered":"L\u2019ADN d\u2019un ancien anc\u00eatre inconnu est dans certains d&rsquo;entres nous"},"content":{"rendered":"<div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"1\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n<p>Les experts viennent d\u2019analyser, \u00e0 nouveau, l\u2019ADN des N\u00e9andertaliens et des Denisoviens. Et ils ont d\u00e9couvert ce qu\u2019ils sugg\u00e8rent \u00eatre notre plus ancien anc\u00eatre, encore inconnu de la science. Il s\u2019agirait de l\u2019Homo erectus, \u00e9teint il y a 100\u2009000 ans environ.<\/p>\n<p>Malheureusement, les chercheurs n\u2019ont aucune preuve tangible de l\u2019exactitude de cette hypoth\u00e8se, car ils n\u2019ont pas trouv\u00e9 de g\u00e9nome qui leur permettrait de s\u2019en assurer.<\/p>\n<p>Pour sa part, le biologiste informatique Adam Siepel, du Laboratoire de Cold Spring Harbor \u00e0 New York, estime que cette \u00e9tude a le m\u00e9rite d\u2019aider l\u2019humanit\u00e9 \u00e0 reconstituer le parcours de l\u2019\u00e9volution de l\u2019homme moderne et des hominid\u00e9s, \u00e0 la fois.<\/p><div class=\"1665f18d14f35dd9e7566e1a8ac9a3e9\" data-index=\"2\" style=\"float: none; margin:10px 0 10px 0; text-align:center;\">\n<script async src=\"https:\/\/pagead2.googlesyndication.com\/pagead\/js\/adsbygoogle.js\"><\/script>\r\n<ins class=\"adsbygoogle\"\r\n     style=\"display:block; text-align:center;\"\r\n     data-ad-layout=\"in-article\"\r\n     data-ad-format=\"fluid\"\r\n     data-ad-client=\"ca-pub-2860849627502538\"\r\n     data-ad-slot=\"3019501113\"><\/ins>\r\n<script>\r\n     (adsbygoogle = window.adsbygoogle || []).push({});\r\n<\/script>\n<\/div>\n\n<p>Dans la recherche qui nous occupe, un algorithme bay\u00e9sien a servi \u00e0 pousser plus loin les analyses des g\u00e9nomes d\u2019un ancien Denisovan, de deux humains africains modernes et de deux N\u00e9andertaliens. En remontant assez loin dans le pass\u00e9 commun de ces esp\u00e8ces, les biologistes esp\u00e9raient retrouver la trace de recombinaison de ces deux ensembles de chromosomes. Ils ont constat\u00e9 que 1 % des caract\u00e9ristiques g\u00e9n\u00e9tiques du Denisovan n\u2019avait pas \u00e9t\u00e9 identifi\u00e9.<\/p>\n<p>Les r\u00e9sultats montrent que l\u2019homme a pu garder 15 % des traits de Denisovan, et que 3 \u00e0 7 % de ceux de Neandertal d\u00e9pendent des H. sapiens. Cependant, il y aurait peu de chance pour que la migration hors de l\u2019Afrique se soit bien produite il y a 50\u2009000 ans, mais qu\u2019ils remonteraient plut\u00f4t \u00e0 200\u2009000 ans. Cela expliquerait mieux l\u2019\u00e9change g\u00e9n\u00e9tique entre les anc\u00eatres les plus proches des Eurasiens, partis d\u2019Afrique, justement \u00e0 cette \u00e9poque-l\u00e0.<\/p>\n<p>extrait et source : <a href=\"https:\/\/ohchouette.com\/certains-humains-portent-ladn-dun-ancetre-ancien-inconnu\/\" rel=\"noopener noreferrer\" target=\"_blank\">https:\/\/ohchouette.com\/<\/a><\/p>\n<p class=\"bawpvc-ajax-counter\" data-id=\"21205\">(654)<\/p>\n<!--CusAds0-->\n<div style=\"font-size: 0px; height: 0px; line-height: 0px; margin: 0; padding: 0; clear: both;\"><\/div>","protected":false},"excerpt":{"rendered":"<p>Les experts viennent d\u2019analyser, \u00e0 nouveau, l\u2019ADN des N\u00e9andertaliens et des Denisoviens. Et ils ont d\u00e9couvert ce qu\u2019ils sugg\u00e8rent \u00eatre&#8230;<\/p>\n","protected":false},"author":1,"featured_media":21206,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_exactmetrics_skip_tracking":false,"_exactmetrics_sitenote_active":false,"_exactmetrics_sitenote_note":"","_exactmetrics_sitenote_category":0,"ngg_post_thumbnail":0,"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"L\u2019#ADN d\u2019un ancien #anc\u00eatre inconnu est dans certains d'entres nous @laterredufutur.com Terra Projects","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2}},"categories":[33],"tags":[954,7456,6446,484],"class_list":["post-21205","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-archeologie","tag-adn","tag-fantome","tag-homo-erectus","tag-homo-sapiens","wpcat-33-id"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2020\/08\/homo-sapiens.jpg?fit=1250%2C703&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p631RN-5w1","jetpack-related-posts":[{"id":24643,"url":"https:\/\/www.laterredufutur.com\/accueil\/decouverte-de-ladn-dune-femme-homo-sapiens-dasie-de-lest-qui-la-relie-aux-premiers-amerindiens\/","url_meta":{"origin":21205,"position":0},"title":"D\u00e9couverte de l&rsquo;ADN d&rsquo;une femme Homo sapiens d&rsquo;Asie de l&rsquo;Est qui la relie aux premiers Am\u00e9rindiens","author":"Admin","date":"10 janvier 2023","format":false,"excerpt":"Une population d'Homo sapiens jusqu'alors inconnue habitait ce qui est aujourd'hui le sud-ouest de la Chine il y a environ 14 000 ans et a contribu\u00e9 \u00e0 l'ascendance des anciens Am\u00e9rindiens. L'identit\u00e9 \u00e9volutive de ce groupe asiatique tr\u00e8s diversifi\u00e9 a \u00e9t\u00e9 r\u00e9v\u00e9l\u00e9e gr\u00e2ce \u00e0 l'ADN ancien extrait d'une calotte cr\u00e2nienne\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/01\/amerindienne.jpg?fit=1000%2C1000&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/01\/amerindienne.jpg?fit=1000%2C1000&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/01\/amerindienne.jpg?fit=1000%2C1000&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2023\/01\/amerindienne.jpg?fit=1000%2C1000&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":25316,"url":"https:\/\/www.laterredufutur.com\/accueil\/une-lignee-humaine-inconnue-enfouie-dans-le-genome-de-neandertal\/","url_meta":{"origin":21205,"position":1},"title":"Une lign\u00e9e humaine inconnue enfouie dans le g\u00e9nome de Neandertal","author":"Admin","date":"27 octobre 2023","format":false,"excerpt":"Lorsque l'Homo sapiens a migr\u00e9 en Eurasie il y a plus de 70 000 ans, une grande partie du continent \u00e9tait d\u00e9j\u00e0 habit\u00e9e par les N\u00e9andertaliens, des hominiens qui partageaient un anc\u00eatre avec nous mais qui avaient pass\u00e9 environ un demi-million d'ann\u00e9es \u00e0 diverger. Nous ne savons pas grand-chose de\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/ao-neandertal.png?fit=979%2C768&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/ao-neandertal.png?fit=979%2C768&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/ao-neandertal.png?fit=979%2C768&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2015\/11\/ao-neandertal.png?fit=979%2C768&ssl=1&resize=700%2C400 2x"},"classes":[]},{"id":10421,"url":"https:\/\/www.laterredufutur.com\/accueil\/homo-sapiens\/","url_meta":{"origin":21205,"position":2},"title":"Homo Sapiens","author":"Admin","date":"9 janvier 2016","format":false,"excerpt":"Les plus anciens membres de l\u2019esp\u00e8ce Homo sapiens ont \u00e9t\u00e9 d\u00e9couverts en Afrique de l\u2019Ouest. Des recherches r\u00e9centes sugg\u00e8rent pourtant que les hommes modernes seraient apparus simultan\u00e9ment dans plusieurs r\u00e9gions d\u2019Afrique. En outre, nos anc\u00eatres ont continu\u00e9 de se reproduire avec d\u2019autres sous-esp\u00e8ces d\u2019Homo, amplifiant leur diversit\u00e9 g\u00e9n\u00e9tique. M\u00e9tissage salvateur\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2016\/01\/homo-sapiens-le-documentaire.jpg?fit=442%2C228&ssl=1&resize=350%2C200","width":350,"height":200},"classes":[]},{"id":17434,"url":"https:\/\/www.laterredufutur.com\/accueil\/genes-fantomes-des-traces-mysterieuses-presentes-dans-le-genome-humain\/","url_meta":{"origin":21205,"position":3},"title":"G\u00e8nes fant\u00f4mes : des traces myst\u00e9rieuses pr\u00e9sentes dans le g\u00e9nome humain","author":"Admin","date":"26 janvier 2019","format":false,"excerpt":"Qu'Homo Sapiens et N\u00e9andertal aient fricot\u00e9 ensemble, on le savait. Mais plus surprenant, des chercheurs ont trouv\u00e9 des liaisons cach\u00e9es avec des populations \u00e9teintes dont nous nous n\u2019avons jamais entendu parler ! Explications. Il y a quelques mois, des d\u00e9couvertes majeures r\u00e9alis\u00e9es gr\u00e2ce \u00e0 la g\u00e9n\u00e9tique ont permis d\u2019\u00e9clairer d\u2019un\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/12\/adn-fantome-homo-sapiens.jpg?fit=584%2C328&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/12\/adn-fantome-homo-sapiens.jpg?fit=584%2C328&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2018\/12\/adn-fantome-homo-sapiens.jpg?fit=584%2C328&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":26461,"url":"https:\/\/www.laterredufutur.com\/accueil\/les-genes-neandertaliens-que-lon-retrouve-aujourdhui-chez-lhomme-proviennent-de-relations-sexuelles-datant-denviron-47-000-ans\/","url_meta":{"origin":21205,"position":4},"title":"Les g\u00e8nes n\u00e9andertaliens que l&rsquo;on retrouve aujourd&rsquo;hui chez l&rsquo;homme proviennent de relations sexuelles datant d&rsquo;environ 47 000 ans","author":"Admin","date":"28 d\u00e9cembre 2024","format":false,"excerpt":"Lorsque les hommes modernes se sont aventur\u00e9s pour la premi\u00e8re fois hors d'Afrique, ils ont suivi les traces d'une autre esp\u00e8ce humaine qui avait os\u00e9 partir avant eux. Nos audacieux anc\u00eatres ont fini par rattraper leurs cousins n\u00e9andertaliens et ont fait un peu plus que se faire des amis. Une\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/12\/ancetre-homo-sapiens.jpg?fit=642%2C360&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/12\/ancetre-homo-sapiens.jpg?fit=642%2C360&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2024\/12\/ancetre-homo-sapiens.jpg?fit=642%2C360&ssl=1&resize=525%2C300 1.5x"},"classes":[]},{"id":19356,"url":"https:\/\/www.laterredufutur.com\/accueil\/la-lignee-de-lhomme-de-denisova-pourrait-representer-trois-especes-humaines\/","url_meta":{"origin":21205,"position":5},"title":"La lign\u00e9e de l&rsquo;Homme de Denisova pourrait repr\u00e9senter trois esp\u00e8ces humaines","author":"Admin","date":"10 ao\u00fbt 2019","format":false,"excerpt":"Des analyses de l'ADN humain moderne sugg\u00e8rent que la lign\u00e9e de l'Homme de Denisova \u00e9tait \u00e9tonnamment diversifi\u00e9e. Il pourrait \u00eatre le dernier \u00e0 avoir pr\u00e9c\u00e9d\u00e9 l'Homo Sapiens. Il y a pr\u00e8s de dix ans, un fragment d'os de petit doigt d\u00e9couvert en Sib\u00e9rie r\u00e9v\u00e9lait aux yeux du monde entier une\u2026","rel":"","context":"Dans &quot;Arch\u00e9ologie&quot;","block_context":{"text":"Arch\u00e9ologie","link":"https:\/\/www.laterredufutur.com\/accueil\/sujets\/archeologie\/"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/07\/papouasie-homme.jpg?fit=1200%2C683&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/07\/papouasie-homme.jpg?fit=1200%2C683&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/07\/papouasie-homme.jpg?fit=1200%2C683&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/07\/papouasie-homme.jpg?fit=1200%2C683&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/www.laterredufutur.com\/accueil\/wp-content\/uploads\/2019\/07\/papouasie-homme.jpg?fit=1200%2C683&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/21205","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/comments?post=21205"}],"version-history":[{"count":1,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/21205\/revisions"}],"predecessor-version":[{"id":21207,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/posts\/21205\/revisions\/21207"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media\/21206"}],"wp:attachment":[{"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/media?parent=21205"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/categories?post=21205"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.laterredufutur.com\/accueil\/wp-json\/wp\/v2\/tags?post=21205"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}