{"id":83172,"date":"2022-12-03T10:00:00","date_gmt":"2022-12-03T13:00:00","guid":{"rendered":"https:\/\/vestibulares.estrategia.com\/portal\/?p=83172"},"modified":"2023-11-30T14:10:41","modified_gmt":"2023-11-30T17:10:41","slug":"mitose-e-meiose","status":"publish","type":"post","link":"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/mitose-e-meiose\/","title":{"rendered":"Mitose e meiose: o que s\u00e3o, diferen\u00e7as e import\u00e2ncia"},"content":{"rendered":"<p class=\"wp-block-paragraph\"><span id=\"urn:enhancement-c7d65538-47f8-4c11-938b-74d6ba0ced9d\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/mitose\">Mitose<\/span> e <span id=\"urn:local-annotation-565251\" class=\"textannotation disambiguated\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/meiose\">meiose<\/span> s&atilde;o dois processos de extrema import&acirc;ncia para a manuten&ccedil;&atilde;o da vida. Por meio deles, as <span id=\"urn:enhancement-986b582c-f002-4056-a44a-f83a54b7f7c1\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span> possuem um n&uacute;mero de material gen&eacute;tico constante entre as esp&eacute;cies. Com isso, &eacute; poss&iacute;vel que as informa&ccedil;&otilde;es gen&eacute;ticas, configura&ccedil;&otilde;es corporais e comportamentais sejam transmitidas de gera&ccedil;&atilde;o para gera&ccedil;&atilde;o, de forma <span id=\"urn:enhancement-b97102bb-2930-4cd2-8228-701fc8c2a4da\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/biologia\">biol&oacute;gica<\/span>.<p class=\"wp-block-paragraph\">No artigo a seguir voc&ecirc; encontra um resumo sobre como essas divis&otilde;es celulares acontecem, com as etapas presentes em cada uma delas e tamb&eacute;m veja a diferen&ccedil;a entre <span id=\"urn:enhancement-a0fe293a-369d-46cd-9fd7-3b5e3cfa4f11\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/mitose\">mitose<\/span> e meiose. Aproveite para acompanhar a resolu&ccedil;&atilde;o de uma quest&atilde;o de <span id=\"urn:enhancement-1a9534f0-64d0-40f4-87ee-7366c5d3ca0a\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/vestibular\">vestibular<\/span> sobre esse tema. Continue lendo e aprenda mais!<\/p><div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-transparent ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\"><p class=\"ez-toc-title\" style=\"cursor:inherit\">Navegue pelo conte\u00fado<\/p>\n<\/div><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/mitose-e-meiose\/#O-que-e-mitose-e-meiose\" >O que &eacute; mitose e meiose?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/mitose-e-meiose\/#Mitose\" >Mitose<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/mitose-e-meiose\/#Meiose\" >Meiose<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/mitose-e-meiose\/#Diferencas-entre-mitose-e-meiose\" >Diferen&ccedil;as entre mitose e meiose<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/mitose-e-meiose\/#Estude-para-o-vestibular-com-o-Estrategia\" >Estude para o vestibular com o Estrat&eacute;gia!<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/mitose-e-meiose\/#Veja-tambem\" >Veja tamb&eacute;m:<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"h-o-que-e-mitose-e-meiose\"><span class=\"ez-toc-section\" id=\"O-que-e-mitose-e-meiose\"><\/span>O que &eacute; mitose e meiose?<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">A <span id=\"urn:enhancement-573dc0e2-b82b-4348-8ca7-9f00853e3a34\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/mitose\">mitose<\/span> e a meiose s&atilde;o formas de <span id=\"urn:enhancement-87c376d8-0d56-41c0-bdec-3ea943cc597f\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/divisao-celular\">divis&atilde;o celular<\/span>, com as quais &eacute; poss&iacute;vel criar <span id=\"urn:enhancement-925129a4-8db5-48f2-b451-8709d3f1aaab\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span> precisamente id&ecirc;nticas ou criar os gametas, como os &oacute;vulos e os espermatozoides. Quando acontecem da maneira correta, garantem que o n&uacute;mero de cromossomos em cada esp&eacute;cie seja cont&iacute;nuo, uma de suas principais fun&ccedil;&otilde;es.<\/p><p class=\"wp-block-paragraph\">Para abordar melhor esses processos, vamos introduzir alguns conceitos essenciais.<\/p><p class=\"wp-block-paragraph\"><strong>Haploidia ou lote haploide <\/strong>&eacute; o nome utilizado para representar um conjunto de n cromossomos. Em cada esp&eacute;cie o n&uacute;mero de n pode ser diferente. No caso dos humanos, n = 23, e somente as <span id=\"urn:enhancement-60a5596d-f82c-4492-b439-bedd0c5847df\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span> gam&eacute;ticas t&ecirc;m essa caracter&iacute;stica.<\/p><p class=\"wp-block-paragraph\"><strong>Diploidia ou lote diploide<\/strong> representa a uni&atilde;o de dois conjuntos cromoss&ocirc;micos de n&uacute;mero n. Essa organiza&ccedil;&atilde;o &eacute; obtida a partir da uni&atilde;o de dois lotes haploides. Na nossa esp&eacute;cie, isso significa que a jun&ccedil;&atilde;o entre o gameta feminino e masculino favorece a forma&ccedil;&atilde;o de <span id=\"urn:enhancement-186ff6ed-7f89-455e-835f-d90e0ae23127\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span> diploides 2n=46. Perceba que cada parte de n &eacute; obtida de um dos progenitores.<\/p><p class=\"wp-block-paragraph\">A partir dessas informa&ccedil;&otilde;es, &eacute; importante classificar meiose e <span id=\"urn:enhancement-db09c48e-3852-45d9-9f29-9678919418a9\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/mitose\">mitose<\/span>:<\/p><ul class=\"wp-block-list\">\n<li>Enquanto a <strong>mitose <\/strong>tem a fun&ccedil;&atilde;o de criar <strong>c&eacute;lulas filhas diploides id&ecirc;nticas <\/strong>&agrave; configura&ccedil;&atilde;o inicial, que s&atilde;o chamadas de estruturas celulares <strong>autoss&ocirc;micas<\/strong>;<\/li>\n\n\n\n<li>A <strong>meiose <\/strong>&eacute; respons&aacute;vel por formar <strong>gametas<\/strong> <strong>hapl&oacute;ides <\/strong>com apenas 23 cromossomos, levando metade das informa&ccedil;&otilde;es gen&eacute;ticas do indiv&iacute;duo.&nbsp;<\/li>\n<\/ul><h2 class=\"wp-block-heading\" id=\"h-mitose\"><span class=\"ez-toc-section\" id=\"Mitose\"><\/span>Mitose<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">A <span id=\"urn:enhancement-81a31a0b-0e0e-4f7e-961d-8811a9488f2e\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/mitose\">mitose<\/span> &eacute; constitu&iacute;da de quatro fases principais: <span id=\"urn:enhancement-01ff842d-b5b3-434a-9b61-36291d5d8bab\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span>, <span id=\"urn:enhancement-88e90d11-77ac-4d80-89b1-cfcc2093751f\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/metafase\">met&aacute;fase<\/span>, <span id=\"urn:enhancement-661ee65e-c1d4-410a-a4d2-b0f55767d235\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/anafase\">an&aacute;fase<\/span> e <span id=\"urn:enhancement-738140a8-0722-4a0a-b04a-02970d70ae31\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/telofase\">tel&oacute;fase<\/span>. Em cada uma delas, a organiza&ccedil;&atilde;o dos cromossomos e do <span id=\"urn:enhancement-7b2ef74e-3ef1-4290-a647-633e7558bf6b\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/citoplasma\">citoplasma<\/span> &eacute; alterada at&eacute; que sejam formadas <span id=\"urn:enhancement-8b8675bc-8ea3-40fb-96e8-0ba9e3aee4d2\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span> filhas id&ecirc;nticas, por meio da divis&atilde;o final, a <span id=\"urn:enhancement-a18edac2-87a0-4f94-93eb-933e0e2c7c1d\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/citocinese\">citocinese<\/span>.&nbsp;<\/p><p class=\"wp-block-paragraph\">Nesse sentido, quando uma c&eacute;lula diploide 2n entra na fase de <span id=\"urn:enhancement-62bba28d-acca-490e-bc74-cba1200d1c06\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/mitose\">mitose<\/span>, ela forma duas <span id=\"urn:enhancement-807bab06-2722-4172-90fe-ff83f1580b26\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span> filhas diploides com material gen&eacute;tico igual ao que estava no n&uacute;cleo celular original. No corpo humano, esse processo garante a renova&ccedil;&atilde;o da pele, porque as camadas superficiais morrem e s&atilde;o substitu&iacute;das por <span id=\"urn:enhancement-2ef488fa-6991-4c3b-89cd-a36f944e5b68\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span> novas id&ecirc;nticas.<\/p><p class=\"wp-block-paragraph\">O primeiro passo mit&oacute;tico &eacute; a duplica&ccedil;&atilde;o dos cromossomos, que acontece na <span id=\"urn:enhancement-d6c97d8b-b5b4-4c67-8069-fa4c9a7273ee\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/fase-s\">fase S<\/span> do <span id=\"urn:enhancement-ddcec5f2-86e2-4e2e-bd9d-11f80bc1a1d0\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/ciclo-celular\">ciclo celular<\/span>. A partir disso, entra-se na <strong><span id=\"urn:enhancement-9d915759-c034-417b-9e0d-f8b6656245fe\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> <\/strong>quando o nucl&eacute;olo, que forma os <span id=\"urn:enhancement-bb9feb28-9475-4553-bea7-21c477061220\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/ribossomo\">ribossomos<\/span>, desaparece. Al&eacute;m de que o material gen&eacute;tico &eacute; mais condensado (ficando mais &ldquo;aglomerado e apertadinho&rdquo;, mais f&aacute;cil de ser transportado e dividido) e se liga aos microt&uacute;bulos, estruturas proteicas importantes para a separa&ccedil;&atilde;o dos cromossomos.<\/p><p class=\"wp-block-paragraph\">Desse ponto em diante, a c&eacute;lula entra em <strong><span id=\"urn:enhancement-cbfd56e4-08f6-4087-9576-c7e0e9c467d2\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/metafase\">met&aacute;fase<\/span><\/strong>, momento em que os cromossomos ficam no meio da c&eacute;lula e a <span id=\"urn:enhancement-d8655cf1-d7d2-410a-b18f-5427e4b86d18\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/membrana\">membrana<\/span> celular j&aacute; est&aacute; em processo de fragmenta&ccedil;&atilde;o. Aqui, o material gen&eacute;tico est&aacute; no maior n&iacute;vel de condensa&ccedil;&atilde;o observado em todo o processo celular.<\/p><p class=\"wp-block-paragraph\">O pr&oacute;ximo passo &eacute; a <strong><span id=\"urn:enhancement-afa19489-ff3a-4be1-97e8-5a3acd6c0c79\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/anafase\">an&aacute;fase<\/span><\/strong>, quando os cromossomos duplicados (possuem duas crom&aacute;tides id&ecirc;nticas) se separam em diferentes p&oacute;los da c&eacute;lula. Dessa forma, cada lado da c&eacute;lula ficar&aacute; com o n&uacute;mero de cromossomos id&ecirc;nticos &agrave; m&atilde;e.<\/p><p class=\"wp-block-paragraph\">A &uacute;ltima etapa da organiza&ccedil;&atilde;o mit&oacute;tica &eacute; a <strong><span id=\"urn:enhancement-b56c4fca-3ba4-4d09-a150-5926cb95b247\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/telofase\">tel&oacute;fase<\/span><\/strong>, etapa respons&aacute;vel pela organiza&ccedil;&atilde;o do n&uacute;cleo em cada extremidade da c&eacute;lula, com ressurgimento do nucl&eacute;olo e ocorre a <span id=\"urn:enhancement-7ee1ce32-8e4a-49e9-a67d-af7090a0c056\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/citocinese\">citocinese<\/span>, quando o <span id=\"urn:enhancement-4c0a3885-c164-4ad2-94b5-13639f26cae1\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/citoplasma\">citoplasma<\/span> &eacute; dividido e formam-se duas novas <span id=\"urn:enhancement-5b856c61-187d-46d2-bda0-d5bf0125ce99\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span>.<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/DuyGxJETEkQiC76CxerNLRe5xlnoaITGRnDNVqfBtoQCpLoEd0zqvRnKx1ZDZKkC-sluxwfKkBxjVVqUSwks40lF1Fmd-OJqXcLDyckZvDp8fWOOhvKnwcVTM77rtKgZSxbq2eg8Cz57c6TJVO34zmV3_MuTAp4uNho960Gpl8Wp-mCHG771zhC8PZEdRA\" alt=\"Esquema mitose e meiose\"><figcaption class=\"wp-element-caption\">Imagem: Adapta&ccedil;&atilde;o\/Wikimedia<\/figcaption><\/figure>\n<\/div><p class=\"wp-block-paragraph\">Observe, ainda, que cada c&eacute;lula 2n possui dois exemplares de cada cromossomo. Quando ocorre a duplica&ccedil;&atilde;o no <span id=\"urn:enhancement-744c7e19-2b80-4567-a544-d58e14139446\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/ciclo-celular\">ciclo celular<\/span>, ela passa a ter dois exemplares duplicados (4n). A partir do momento da <span id=\"urn:enhancement-13b7c266-4476-4b25-b238-7fa9f1fd391e\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/anafase\">an&aacute;fase<\/span>, esse material gen&eacute;tico &eacute; novamente dividido e as <span id=\"urn:enhancement-73cd8d59-cdda-4812-b82f-b00607502e8d\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span> formadas ter&atilde;o 2n cromossomos.<\/p><p class=\"wp-block-paragraph\">+ Veja mais: <a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/acidos-nucleicos\/\" target=\"_blank\">&Aacute;cidos nucleicos: o que s&atilde;o, DNA, RNA e import&acirc;ncia<\/a><\/p><h2 class=\"wp-block-heading\" id=\"h-meiose\"><span class=\"ez-toc-section\" id=\"Meiose\"><\/span>Meiose<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Para formar <span id=\"urn:enhancement-f4580694-3c28-42e7-840c-5db1b07a1b0e\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span> com apenas um lote haploide de cromossomos, a meiose cont&eacute;m duas divis&otilde;es celulares consecutivas, que passam por etapas semelhantes ao que foi visto no processo mit&oacute;tico.<\/p><p class=\"wp-block-paragraph\">Essas fases s&atilde;o chamadas de meiose I e meiose II. Cada uma delas possui uma <span id=\"urn:enhancement-2af7b40d-3d29-4db9-b362-0b1eb4cd86f4\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span>, uma <span id=\"urn:enhancement-5d229dda-9a48-4251-9ace-8b1cbb51fc50\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/metafase\">met&aacute;fase<\/span>, uma <span id=\"urn:enhancement-4397465d-325a-409b-80fe-f8cd8a92f902\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/anafase\">an&aacute;fase<\/span>, uma <span id=\"urn:enhancement-41e25af2-b773-44c7-8f06-81a3498ef732\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/telofase\">tel&oacute;fase<\/span> e uma <span id=\"urn:enhancement-88a0b0c0-581e-498c-b9ac-5b6c4e21a8a8\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/citocinese\">citocinese<\/span>. Embora as ideias sejam semelhantes, existem eventos exclusivos da meiose que ser&atilde;o abordados a seguir.<\/p><p class=\"wp-block-paragraph\">Depois da duplica&ccedil;&atilde;o cromoss&ocirc;mica, o evento mei&oacute;tico inicia-se com a <strong><span id=\"urn:enhancement-a5e92f2b-bca8-4534-b603-a1ccc5931388\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> I<\/strong>, quando o material gen&eacute;tico est&aacute; se condensando e se ligando aos microt&uacute;bulos. Nesse processo, os cromossomos hom&oacute;logos (que possuem mesmo tamanho e genes para a mesma caracter&iacute;stica, como a cor da pele) s&atilde;o posicionados lado a lado. Durante esse pareamento dos cromossomos hom&oacute;logos, observou-se que eles podem trocar informa&ccedil;&otilde;es gen&eacute;ticas entre si, em uma etapa conhecida como <strong><span id=\"urn:enhancement-78e08b63-df26-412b-b897-74a942858acc\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/crossing-over\">crossing-over<\/span><\/strong>.&nbsp;<\/p><p class=\"wp-block-paragraph\">Isso significa que crom&aacute;tides hom&oacute;logas podem trocar genes e adquirir novas configura&ccedil;&otilde;es. De certa forma, essa mistura das informa&ccedil;&otilde;es gen&eacute;ticas permite que genes diferentes interajam entre si e garantem uma variabilidade de caracter&iacute;sticas para os indiv&iacute;duos.<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/lh6.googleusercontent.com\/sM3_AOk37aOaDXwALCIgH2illy5QR2K73ivarXBpb7WRP2Zqi3Jv3hmsphLLYDN50laXdP8UbwkTKMNPM_vjYq9zGog9ofZqd_UwwYh5fYVUIzyeHfvVWiRJLhfHEMfwR5K2LdDlaemszfJ1IxKtDHG5K1uCJAt37S-NVXX1neTRQEyLgaBJ5oLJES2uZw\" alt=\"Divis&atilde;o meiose\"><figcaption class=\"wp-element-caption\">Imagem: Reprodu&ccedil;&atilde;o\/Wikimedia<\/figcaption><\/figure>\n<\/div><p class=\"wp-block-paragraph\">Ap&oacute;s esse momento, inicia-se a <strong><span id=\"urn:enhancement-96548255-791c-493d-bc42-3c0dc1ee6e44\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/metafase\">met&aacute;fase<\/span> I<\/strong> e os cromossomos s&atilde;o posicionados no meio da placa celular. &Eacute; importante perceber que cada <strong>cromossomo hom&oacute;logo<\/strong> est&aacute; relacionado com a extremidade oposta da c&eacute;lula.&nbsp;<\/p><p class=\"wp-block-paragraph\">Por isso, durante a <strong><span id=\"urn:enhancement-a0f62bc7-b472-40c9-80e3-63090ca72c48\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/anafase\">an&aacute;fase<\/span> I <\/strong>ocorre a divis&atilde;o do material gen&eacute;tico, de forma que cada polo celular ter&aacute; um cromossomo hom&oacute;logo. Por fim, a <span id=\"urn:enhancement-74dfb93c-25f2-4281-8d83-761f5a315e77\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/telofase\">tel&oacute;fase<\/span> e a <span id=\"urn:enhancement-4646effd-cbf4-4446-a749-eae87a240193\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/citocinese\">citocinese<\/span> favorecem o nascimento de duas <span id=\"urn:enhancement-c35a62aa-9a2e-402f-b861-0d882ddf61d2\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span> hapl&oacute;ides, com metade do n&uacute;mero de cromossomos da c&eacute;lula m&atilde;e.<\/p><p class=\"wp-block-paragraph\">A partir desse ponto inicia-se a <strong>meiose II<\/strong>. Agora, a <strong><span id=\"urn:enhancement-a858ab0f-c25c-4e73-b0eb-36c505070ec1\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> II<\/strong> promove uma nova condensa&ccedil;&atilde;o dos cromossomos nas <span id=\"urn:enhancement-c4b08a64-0d41-4679-8762-422dea523b23\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas-haploides\">c&eacute;lulas haploides<\/span>. N&atilde;o h&aacute; replica&ccedil;&atilde;o do material gen&eacute;tico e o processo encaminha-se para a <strong><span id=\"urn:enhancement-fb76b658-c6e8-432a-b55b-c7e6fa920803\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/metafase\">met&aacute;fase<\/span> II<\/strong>, quando o material gen&eacute;tico &eacute; posicionado no centro do <span id=\"urn:enhancement-ba2ec92a-e2ec-499a-8d7c-30998c2ab194\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/citoplasma\">citoplasma<\/span> celular.&nbsp;<\/p><p class=\"wp-block-paragraph\">A estruturas celulares iniciam a <strong><span id=\"urn:enhancement-bda5a1d6-8cfe-4369-96b9-c2df992d948d\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/anafase\">an&aacute;fase<\/span> II<\/strong> e ent&atilde;o cada cromossomo ser&aacute; dividido em duas crom&aacute;tides.Ent&atilde;o, a <strong><span id=\"urn:enhancement-1d3e2ffc-b931-4c24-8655-8ae78ae8ea9c\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/telofase\">tel&oacute;fase<\/span> II<\/strong> forma dois polos haploides com cromossomos simples, com a divis&atilde;o <span id=\"urn:enhancement-8635f58d-8702-4fc7-996b-e973efb9eedd\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/citoplasma\">citoplasm&aacute;tica<\/span> da <span id=\"urn:enhancement-b3fbdced-d3f8-4032-a28a-a08739f03039\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/citocinese\">citocinese<\/span>.<\/p><div class=\"wp-block-image\">\n<figure class=\"aligncenter\"><img decoding=\"async\" src=\"https:\/\/lh3.googleusercontent.com\/eBJm4sbzOGFHeR2iJwKIQ0GK-zq1xjdpsqKX-n9n88h-78wOGutxmlOA3Br_T4_GPNn_9NZbx433oDJ_X_8K7qRP2QWkRPY2uZPs2vQW08Roqt-Po371uhgmM2hGc1GMzxqQhEcB4jdjDQ2NloOXZnva8hFvg2vYMmAO6NX32FaKTLVx67JP9RY0vjZOHg\" alt=\"Divis&atilde;o meiose\"><figcaption class=\"wp-element-caption\">Imagem: Adapta&ccedil;&atilde;o\/Wikimedia<\/figcaption><\/figure>\n<\/div><p class=\"wp-block-paragraph\">Note, na imagem acima, enhancement-b3fbdced-d3f8-4032-a28a-a08739f03039&Prime; class=&rdquo;textannotation&rdquo;&gt;que a<strong> meiose I origina duas <span id=\"urn:enhancement-06cc1c89-28e3-484d-a6bb-39044a309baa\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/&lt;\/span&gt;entity\/celulas&rdquo;&gt;c&eacute;lulas&lt;\/span&gt; filhas&lt;\/strong&gt;, que se dividir&atilde;o na &lt;strong&gt;meiose II formando quatro &lt;span id=\" urn:enhancement-fd208997-f6d7-4a2d-b85f-8bec575856b9>c&eacute;lulas<\/span> filhas haploides<\/strong>. Por meio desse processo, s&atilde;o formados os gametas humanos, que se juntar&atilde;o para formar um ser humano com <span id=\"urn:enhancement-1eed5211-f769-44e1-905f-18f9dc201cd5\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span> diploides e caracter&iacute;sticas genot&iacute;picas e <span id=\"urn:enhancement-e3324356-a8a5-4720-b380-d1f2a5e4e5b1\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/fenotipica\">fenot&iacute;picas<\/span> mistas entre o progenitor feminino e masculino.<\/p><h2 class=\"wp-block-heading\" id=\"h-diferencas-entre-mitose-e-meiose\"><span class=\"ez-toc-section\" id=\"Diferencas-entre-mitose-e-meiose\"><\/span>Diferen&ccedil;as entre mitose e meiose<span class=\"ez-toc-section-end\"><\/span><\/h2><figure class=\"wp-block-table\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\"><strong><span id=\"urn:enhancement-8121457c-caf9-4a31-9fdd-731639647bfb\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/mitose\">Mitose<\/span><\/strong><\/td><td class=\"has-text-align-center\" data-align=\"center\"><strong>Meiose<\/strong><\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Uma &uacute;nica <span id=\"urn:enhancement-40de48fd-5750-4351-b5ce-3edd4c0ff8d6\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/divisao-celular\">divis&atilde;o celular<\/span>.<\/td><td class=\"has-text-align-center\" data-align=\"center\">Duas divis&otilde;es celulares.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Forma duas <span id=\"urn:enhancement-4ad776dd-244d-41d7-a4a1-8669bfd217fd\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span> diploides id&ecirc;nticas.<\/td><td class=\"has-text-align-center\" data-align=\"center\">Forma quatro <span id=\"urn:enhancement-82ec8151-5085-4a65-afa4-df8748b463eb\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas-haploides\">c&eacute;lulas haploides<\/span>.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">N&atilde;o garante variabilidade <span id=\"urn:enhancement-262d4da7-1c2c-40e8-b492-02bd038f0591\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/genetica\">gen&eacute;tica<\/span>.<\/td><td class=\"has-text-align-center\" data-align=\"center\">Garante variabilidade <span id=\"urn:enhancement-1bb83e3a-7316-407c-b987-b14b73510eb2\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/genetica\">gen&eacute;tica<\/span> por meio do <span id=\"urn:enhancement-16e4f6df-0071-45cd-a4f9-41169534cb2f\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/crossing-over\">crossing-over<\/span> que ocorre na <span id=\"urn:enhancement-8aab674b-fd46-43ba-b92d-943f9286c8bc\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> I.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Chamado de processo equacional, porque forma <span id=\"urn:enhancement-ab71d9f9-68de-4e7e-89fa-1fafb965ea6a\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span> com a mesma quantidade de material gen&eacute;tico.<\/td><td class=\"has-text-align-center\" data-align=\"center\">Processo reducional, porque forma <span id=\"urn:enhancement-1cca2479-d5ef-4bd3-afe6-23a005d5edd1\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas-haploides\">c&eacute;lulas haploides<\/span> a partir de <span id=\"urn:enhancement-e2e28f94-e34f-4e8c-b50d-1ac6d045a003\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span> diploides.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Ocorre em <span id=\"urn:enhancement-041bde97-1ec8-4ab8-aaf5-caa7701f3f25\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span> som&aacute;ticas ou autoss&ocirc;micas.<\/td><td class=\"has-text-align-center\" data-align=\"center\">Ocorre nas <span id=\"urn:enhancement-84743ced-e3b3-43c2-a320-93e6cfd914b6\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span> germinativas, como nos &oacute;vulos e espermatozoides.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">A <span id=\"urn:enhancement-c99e8aac-f8dd-45fc-8190-f6ab30fb5f93\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/anafase\">an&aacute;fase<\/span> separa crom&aacute;tides irm&atilde;s.<\/td><td class=\"has-text-align-center\" data-align=\"center\">A <span id=\"urn:enhancement-f100f2a9-c4c5-4dbf-a05b-97f69575497b\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/anafase\">an&aacute;fase<\/span> I separ&aacute; cromossomos hom&oacute;logos e a <span id=\"urn:enhancement-499a9e0e-022e-4f80-9d46-463a84a4b3d3\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/anafase\">an&aacute;fase<\/span> II separa crom&aacute;tides irm&atilde;s.<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Garante o desenvolvimento, crescimento e reparo das <span id=\"urn:enhancement-a7427201-aefe-452b-9121-55df52304961\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/celulas\">c&eacute;lulas<\/span> em plantas e animais.<\/td><td class=\"has-text-align-center\" data-align=\"center\">Garante a reprodu&ccedil;&atilde;o e propaga&ccedil;&atilde;o da esp&eacute;cie.<\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\" id=\"h-estude-para-o-vestibular-com-o-estrategia\"><span class=\"ez-toc-section\" id=\"Estude-para-o-vestibular-com-o-Estrategia\"><\/span>Estude para o vestibular com o Estrat&eacute;gia!<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">Gostou do artigo e quer ter acesso a mais conte&uacute;dos do Estrat&eacute;gia? Clique no banner abaixo e conhe&ccedil;a nossos cursos preparat&oacute;rios para os vestibulares, nos quais voc&ecirc; encontrar&aacute; simulados, listas de exerc&iacute;cios, f&oacute;runs de d&uacute;vidas, aulas gravadas, materiais did&aacute;ticos e muito mais. N&atilde;o perca tempo!<\/p><p class=\"wp-block-paragraph\"><a id=\"cta\" class=\"cta-imagem\" href=\"https:\/\/vestibulares.estrategia.com\/cursos\/\" target=\"blank\">\n                <img decoding=\"async\" width=\"100%\" src=\"https:\/\/vestibulares.estrategia.com\/portal\/wp-content\/uploads\/2021\/12\/EV4.jpg\" alt=\"CTA - Estrat\u00e9gia Vestibulares 4\" title=\"CTA - Estrat\u00e9gia Vestibulares 4\">\n        <\/a>\n\n\n\n<\/p><h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Veja-tambem\"><\/span>Veja tamb&eacute;m:<span class=\"ez-toc-section-end\"><\/span><\/h2><ul class=\"wp-block-list\">\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/biologia\/ciclo-celular\/\">Ciclo celular: fases, divis&atilde;o e controle<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/entidade\/metafase\/\">Met&aacute;fase<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/biologia\/tipos-de-celulas\/\">Tipos de c&eacute;lulas: eucariontes, procariontes e diferen&ccedil;as<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/biologia\/histologia-animal\/\">Histologia Animal: fundamentos e caracter&iacute;sticas teciduais<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/organelas-celulares\/\">Organelas celulares: quais s&atilde;o, fun&ccedil;&otilde;es, tipos e exerc&iacute;cios<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/biologia\/respiracao-celular\/\">Respira&ccedil;&atilde;o Celular: conceito, etapas e como acontecem os processos<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/bioquimica-celular\/\">Bioqu&iacute;mica celular: o que &eacute;, organelas, metabolismo e mais<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/biologia\/sintese-proteica\/\">S&iacute;ntese proteica: o que &eacute;, onde ocorre e etapas!<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/membrana-plasmatica\/\">Membrana Plasm&aacute;tica: qual a fun&ccedil;&atilde;o e suas caracter&iacute;sticas?<\/a><\/li>\n<\/ul><\/p>\n","protected":false},"excerpt":{"rendered":"Mitose e meiose s&atilde;o dois processos de extrema import&acirc;ncia para a manuten&ccedil;&atilde;o da vida. Por meio deles, as&hellip;\n","protected":false},"author":23,"featured_media":84829,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[31],"tags":[],"class_list":["post-83172","post","type-post","status-publish","format-standard","has-post-thumbnail","category-biologia"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v25.9 (Yoast SEO v28.2) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Mitose e meiose: o que s\u00e3o, diferen\u00e7as e import\u00e2ncia<\/title>\n<meta name=\"description\" content=\"Resumo sobre divis\u00f5es celulares, com as etapas presentes em cada uma delas e tamb\u00e9m veja a diferen\u00e7a entre mitose e meiose.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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