{"id":6943,"date":"2020-05-08T17:31:55","date_gmt":"2020-05-08T20:31:55","guid":{"rendered":"https:\/\/biologo.com.br\/bio\/?p=6943"},"modified":"2020-05-08T17:42:08","modified_gmt":"2020-05-08T20:42:08","slug":"mutacao","status":"publish","type":"post","link":"https:\/\/biologo.com.br\/bio\/mutacao\/","title":{"rendered":"Muta\u00e7\u00e3o"},"content":{"rendered":"<p><span style=\"font-size: 14pt;\"><span style=\"color: #3366ff;\"><strong>Muta\u00e7\u00e3o:<\/strong> <\/span>Em 2020 vimos como uma muta\u00e7\u00e3o em um \u00fanico v\u00edrus mudou o curso da hist\u00f3ria e abalou o mundo. Mas muta\u00e7\u00e3o h\u00e1 muito \u00e9 alvo do interesse de bi\u00f3logos por ser fen\u00f4meno-chave que permite a evolu\u00e7\u00e3o e cria\u00e7\u00e3o de novas esp\u00e9cies.<\/span><\/p>\n<p><span style=\"font-family: 'courier new', courier, monospace; font-size: 24pt; color: #000000;\"><strong>Muta\u00e7\u00e3o <\/strong><\/span><\/p>\n<p><span style=\"color: #000000;\"><span style=\"font-family: georgia, palatino, serif; font-size: 24pt;\"><strong>U<\/strong><\/span>ma muta\u00e7\u00e3o \u00e9 uma altera\u00e7\u00e3o na sequ\u00eancia nucleot\u00eddica do genoma de um organismo, v\u00edrus ou DNA extracromoss\u00f4mico. Os genomas virais podem ser de DNA ou RNA.\u00a0<\/span><\/p>\n<figure id=\"attachment_2242\" aria-describedby=\"caption-attachment-2242\" style=\"width: 300px\" class=\"wp-caption alignright\"><a style=\"color: #000000;\" href=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/03\/mitose.jpg?ssl=1\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"2242\" data-permalink=\"https:\/\/biologo.com.br\/bio\/biologia-do-desenvolvimento\/mitose\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/03\/mitose.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"mitose\" data-image-description=\"&lt;p&gt;By Doc. RNDr. Josef Reischig, CSc. (Author&amp;#8217;s archive) [CC BY-SA 3.0 (http:\/\/creativecommons.org\/licenses\/by-sa\/3.0)], via Wikimedia Commons Muta\u00e7\u00e3o&lt;\/p&gt;\n\" data-image-caption=\"&lt;p&gt;Mitose. By Doc. RNDr. Josef Reischig, CSc. (Author&amp;#8217;s archive) &lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/03\/mitose.jpg?fit=631%2C351&amp;ssl=1\" class=\"size-medium wp-image-2242\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/03\/mitose.jpg?resize=300%2C167&#038;ssl=1\" alt=\"Mitose\" width=\"300\" height=\"167\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/03\/mitose.jpg?resize=300%2C167&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2017\/03\/mitose.jpg?w=631&amp;ssl=1 631w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-2242\" class=\"wp-caption-text\"><span style=\"color: #000000;\">Mitose. <span style=\"font-size: 8pt;\">By Doc. RNDr. Josef Reischig, CSc.\u00a0<\/span><\/span><\/figcaption><\/figure>\n<p><span style=\"color: #000000;\">As muta\u00e7\u00f5es resultam de erros durante a replica\u00e7\u00e3o do DNA, mitose e meiose ou outros tipos de danos ao DNA. Podem ser causadas por exposi\u00e7\u00e3o a radia\u00e7\u00e3o ultravioleta ou ionizante, agentes qu\u00edmicos, ou v\u00edrus.<\/span><\/p>\n<ul>\n<li><span style=\"font-size: 14pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/hereditariedade\/\">Hereditariedade<\/a><\/span><\/li>\n<li><span style=\"font-size: 14pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/da-fecundacao-ao-nascimento\/\">Da fecunda\u00e7\u00e3o ao nascimento<\/a><\/span><\/li>\n<li><span style=\"font-size: 14pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/importancia-da-genetica\/\">Import\u00e2ncia da Gen\u00e9tica<\/a><\/span><\/li>\n<\/ul>\n<p><span style=\"color: #000000;\">As muta\u00e7\u00f5es s\u00e3o tidas como o mecanismo que permite a a\u00e7\u00e3o da sele\u00e7\u00e3o natural. Isto porque insere a varia\u00e7\u00e3o gen\u00e9tica sobre a qual ela ir\u00e1 agir, fornecendo as novas caracter\u00edsticas vantajosas que sobrevivem e se multiplicam nas gera\u00e7\u00f5es subsequentes ou as caracter\u00edsticas delet\u00e9rias que desaparecem em organismos mais fracos.<\/span><\/p>\n<figure id=\"attachment_4587\" aria-describedby=\"caption-attachment-4587\" style=\"width: 300px\" class=\"wp-caption alignleft\"><a href=\"https:\/\/biologo.com.br\/bio\/uma-nova-origem-das-especies\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"4587\" data-permalink=\"https:\/\/biologo.com.br\/bio\/a-origem-das-especies\/a-origem-das-especies-2\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/08\/A-Origem-das-Esp%C3%A9cies.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"A-Origem-das-Esp\u00e9cies\" data-image-description=\"\" data-image-caption=\"\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/08\/A-Origem-das-Esp%C3%A9cies.jpg?fit=631%2C351&amp;ssl=1\" class=\"wp-image-4587 size-medium\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/08\/A-Origem-das-Esp%C3%A9cies.jpg?resize=300%2C167&#038;ssl=1\" alt=\"Darwin - Muta\u00e7\u00e3o\" width=\"300\" height=\"167\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/08\/A-Origem-das-Esp%C3%A9cies.jpg?resize=300%2C167&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/08\/A-Origem-das-Esp%C3%A9cies.jpg?w=631&amp;ssl=1 631w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-4587\" class=\"wp-caption-text\"><span style=\"font-size: 10pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/uma-nova-origem-das-especies\/\">Uma Nova Origem das Esp\u00e9cies<\/a><\/span><\/figcaption><\/figure>\n<p><a href=\"https:\/\/biologo.com.br\/bio\/a-celula-e-suas-organelas\/\"> A c\u00e9lula<\/a> po<span style=\"color: #000000;\">de tamb\u00e9m causar muta\u00e7\u00f5es deliberadamente durante processos conhecidos como hipermuta\u00e7\u00e3o. Em organismos multicelulares, as muta\u00e7\u00f5es podem ser divididas entre muta\u00e7\u00e3o de linhagem germinativa, que pode ser passada aos descendentes, e muta\u00e7\u00f5es som\u00e1ticas, que n\u00e3o s\u00e3o transmitidas aos descendentes em animais.<\/span><\/p>\n<h4><span style=\"font-family: 'courier new', courier, monospace; font-size: 12pt; color: #000000;\"><strong>Particularidades<\/strong><\/span><\/h4>\n<p><span style=\"color: #000000;\">Em alguns casos, plantas podem transmitir muta\u00e7\u00f5es som\u00e1ticas aos seus descendentes, de forma assexuada ou sexuada (em casos em que as gemas de flores se desenvolvam numa parte que sofreu muta\u00e7\u00e3o som\u00e1tica).<\/span><\/p>\n<p><span style=\"color: #000000;\">Assim, essa classifica\u00e7\u00e3o \u00e9 pouco eficiente para plantas, se ajustando melhor a animais. Uma nova muta\u00e7\u00e3o que n\u00e3o foi herdada de nenhum dos pais \u00e9 chamada de muta\u00e7\u00e3o de novo. A fonte da muta\u00e7\u00e3o n\u00e3o se relaciona com seus efeitos, apesar de seus efeitos estarem relacionados com quais c\u00e9lulas s\u00e3o afetadas pela muta\u00e7\u00e3o.<\/span><\/p>\n<figure id=\"attachment_4824\" aria-describedby=\"caption-attachment-4824\" style=\"width: 300px\" class=\"wp-caption alignright\"><a href=\"https:\/\/biologo.com.br\/bio\/genoma-a-autobiografia-de-uma-especie-em-23-capitulos\/\"><img data-recalc-dims=\"1\" loading=\"lazy\" decoding=\"async\" data-attachment-id=\"4824\" data-permalink=\"https:\/\/biologo.com.br\/bio\/genoma-a-autobiografia-de-uma-especie-em-23-capitulos\/genoma-a-autobiografia-de-uma-especie\/\" data-orig-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/09\/Genoma-A-Autobiografia-de-uma-Esp%C3%A9cie.jpg?fit=631%2C351&amp;ssl=1\" data-orig-size=\"631,351\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;&quot;,&quot;created_timestamp&quot;:&quot;0&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Genoma-A-Autobiografia-de-uma-Esp\u00e9cie\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Genoma: A Autobiografia de uma Esp\u00e9cie&lt;\/p&gt;\n\" data-large-file=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/09\/Genoma-A-Autobiografia-de-uma-Esp%C3%A9cie.jpg?fit=631%2C351&amp;ssl=1\" class=\"wp-image-4824 size-medium\" src=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/09\/Genoma-A-Autobiografia-de-uma-Esp%C3%A9cie.jpg?resize=300%2C167&#038;ssl=1\" alt=\"\" width=\"300\" height=\"167\" srcset=\"https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/09\/Genoma-A-Autobiografia-de-uma-Esp%C3%A9cie.jpg?resize=300%2C167&amp;ssl=1 300w, https:\/\/i0.wp.com\/biologo.com.br\/bio\/wp-content\/uploads\/2018\/09\/Genoma-A-Autobiografia-de-uma-Esp%C3%A9cie.jpg?w=631&amp;ssl=1 631w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/a><figcaption id=\"caption-attachment-4824\" class=\"wp-caption-text\"><span style=\"font-size: 10pt; color: #0000ff;\"><a style=\"color: #0000ff;\" href=\"https:\/\/biologo.com.br\/bio\/genoma-a-autobiografia-de-uma-especie-em-23-capitulos\/\">Genoma: A Autobiografia de uma Esp\u00e9cie<\/a><\/span><\/figcaption><\/figure>\n<p><span style=\"color: #000000;\">Muta\u00e7\u00f5es neutras s\u00e3o definidas como muta\u00e7\u00f5es cujos efeitos n\u00e3o influenciam a aptid\u00e3o dos indiv\u00edduos. Essas muta\u00e7\u00f5es podem se acumular ao longo do tempo devido \u00e0 <span style=\"text-decoration: underline;\"><a style=\"color: #000000; text-decoration: underline;\" href=\"https:\/\/pt.khanacademy.org\/science\/biology\/her\/heredity-and-genetics\/a\/genetic-drift-founder-bottleneck\" target=\"_blank\" rel=\"noopener noreferrer\">deriva gen\u00e9tica<\/a><\/span>.<\/span><\/p>\n<p><span style=\"color: #000000;\">Acredita-se que a imensa maioria das muta\u00e7\u00f5es n\u00e3o tem efeito significativo na aptid\u00e3o dos organismos. Essa teoria neutralista foi desenvolvida por Motoo Kimura em seu livro &#8220;<em>The Neutral Theory of Molecular Evolution<\/em>&#8221; (dispon\u00edvel em <span style=\"text-decoration: underline;\"><a style=\"color: #000000; text-decoration: underline;\" href=\"https:\/\/biologo.com.br\/bio\/livros-de-biologia-para-download\/\">Livros de biologia para download<\/a>.<\/span>)<\/span><\/p>\n<p><span style=\"color: #000000;\">Al\u00e9m disso, mecanismos de reparo de DNA s\u00e3o capazes de corrigir a maior parte das mudan\u00e7as antes que elas se tornem muta\u00e7\u00f5es permanentes, e muitos organismos t\u00eam mecanismos para eliminar c\u00e9lulas som\u00e1ticas que sofreram muta\u00e7\u00f5es.<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Muta\u00e7\u00e3o: Em 2020 vimos como uma muta\u00e7\u00e3o em um \u00fanico v\u00edrus mudou o curso da hist\u00f3ria e abalou o mundo.<\/p>\n","protected":false},"author":1,"featured_media":2242,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"colormag_page_container_layout":"default_layout","colormag_page_sidebar_layout":"default_layout","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":"Muta\u00e7\u00e3o","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":[119,121,2],"tags":[],"class_list":["post-6943","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-bioquimica","category-evolucao","category-genetica"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Muta\u00e7\u00e3o - Gen\u00e9tica; Sele\u00e7\u00e3o Natural; Evolu\u00e7\u00e3o; DNA e RNA - Bi\u00f3logo<\/title>\n<meta name=\"description\" content=\"Em 2020 vemos como uma muta\u00e7\u00e3o em um \u00fanico v\u00edrus muda o curso da hist\u00f3ria e abala o mundo. 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