{"id":84714,"date":"2022-12-16T17:00:00","date_gmt":"2022-12-16T20:00:00","guid":{"rendered":"https:\/\/vestibulares.estrategia.com\/portal\/?p=84714"},"modified":"2023-11-30T15:19:32","modified_gmt":"2023-11-30T18:19:32","slug":"profase","status":"publish","type":"post","link":"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/profase\/","title":{"rendered":"Pr\u00f3fase: o que \u00e9, resumo, pr\u00f3fase I e II, quest\u00f5es"},"content":{"rendered":"<p class=\"wp-block-paragraph\">A <span id=\"urn:enhancement-0fa36b2f-e619-4edb-94d8-dfeece43de30\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> &eacute; a primeira fase da <span id=\"urn:enhancement-981b93c0-0e4e-459c-920a-cc8bca19cd78\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/divisao-celular\">divis&atilde;o celular<\/span>, que acontece na <span id=\"urn:enhancement-28e035b8-2328-4e42-be4f-37ade8d992a9\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/mitose\">mitose<\/span> e na <span id=\"urn:enhancement-e0d2f03c-c4a4-4588-b3ff-9f007b47039a\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/meiose\">meiose<\/span>, como um momento de prepara&ccedil;&atilde;o para os processos posteriores. &Eacute; nesse momento que o aparelho celular que desenvolve toda a <span id=\"urn:enhancement-bdbb2be1-4035-4ebe-a52c-682633ba4697\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/mitose\">mitose<\/span> entra em a&ccedil;&atilde;o, por isso, &eacute; essencial que a <span id=\"urn:enhancement-d799b690-7a30-43fc-8156-699ba39a46e2\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> ocorra corretamente.&nbsp;&nbsp;<p class=\"wp-block-paragraph\">Continue lendo este artigo e entenda as altera&ccedil;&otilde;es citoplasm&aacute;ticas e nucleares que ocorrem em uma c&eacute;lula durante a <span id=\"urn:enhancement-c5165709-8dd1-4106-abfc-5276e976281d\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span>, tanto na <span id=\"urn:enhancement-c652407e-bb0e-4a38-b690-98fcc2b307db\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/mitose\">mitose<\/span>, como na <span id=\"urn:enhancement-793545a1-26f8-4732-a7cf-e5ec9312b603\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/meiose\">meiose<\/span>. Acompanhe tamb&eacute;m a resolu&ccedil;&atilde;o de quest&otilde;es de prova que abrangem assuntos da citologia!<\/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\/profase\/#O-que-e-profase\" >O que &eacute; pr&oacute;fase?<\/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\/profase\/#Eventos-que-acontecem-na-profase\" >Eventos que acontecem na pr&oacute;fase<\/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\/profase\/#Profase-da-mitose-e-da-meiose\" >Pr&oacute;fase da mitose e da 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\/profase\/#Questao-de-vestibular\" >Quest&atilde;o de vestibular<\/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\/profase\/#Estude-para-o-vestibular-com-a-Coruja\" >Estude para o vestibular com a Coruja!<\/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\/profase\/#Veja-tambem\" >Veja tamb&eacute;m:<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\" id=\"h-o-que-e-profase\"><span class=\"ez-toc-section\" id=\"O-que-e-profase\"><\/span>O que &eacute; pr&oacute;fase?<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">No <a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/ciclo-celular\/\" target=\"_blank\">ciclo celular<\/a>, a <span id=\"urn:enhancement-1cd70635-3169-45d7-aaf8-65fd21c318ba\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> &eacute; a etapa que marca o in&iacute;cio da <a href=\"https:\/\/www.youtube.com\/watch?v=b5R6_67u3ks\" target=\"_blank\">divis&atilde;o celular<\/a>. Primeiramente, a c&eacute;lula est&aacute; realizando suas fun&ccedil;&otilde;es e participando do metabolismo, no per&iacute;odo chamado de <span id=\"urn:enhancement-0d57c72c-4f1f-4a02-b833-737432da07fb\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/interfase\">interfase<\/span>. Quando algum est&iacute;mulo identifica a necessidade de dividir, a c&eacute;lula &eacute; direcionada para a <span id=\"urn:enhancement-6118e320-0a3d-479f-accf-20f6affbdec6\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span>, quando ocorrem altera&ccedil;&otilde;es gen&eacute;ticas e estruturais para que o processo aconte&ccedil;a perfeitamente.<\/p><p class=\"wp-block-paragraph\">A <span id=\"urn:enhancement-5bf25c15-6d1d-4854-b790-dba2c38ef936\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> &eacute; considerada a fase mais longa e mais importante do <span id=\"urn:enhancement-d966da40-378a-4ccd-a4b2-d9da26976e4b\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/ciclo-celular\">ciclo celular<\/span>, porque ela propicia todas as etapas cruciais para o desenvolvimento tanto da <span id=\"urn:enhancement-3cf4e9c3-9956-4b40-b8f1-a7edb9d47069\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/mitose\">mitose<\/span> quanto da <span id=\"urn:enhancement-fe633e4a-30bf-4fe7-b981-0eb0a2dd23da\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/meiose\">meiose<\/span>, com atua&ccedil;&atilde;o sobre n&uacute;cleo, <span id=\"urn:enhancement-c24fd0bb-5590-4aaf-b27e-49de921b6449\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/citoplasma\">citoplasma<\/span>, <span id=\"urn:enhancement-51b9a1aa-4eb3-48f7-a0ad-fc2fd4090453\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/organela\">organelas<\/span> e material gen&eacute;tico.<\/p><h2 class=\"wp-block-heading\" id=\"h-eventos-que-acontecem-na-profase\"><span class=\"ez-toc-section\" id=\"Eventos-que-acontecem-na-profase\"><\/span>Eventos que acontecem na pr&oacute;fase<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">O primeiro passo observado s&atilde;o as modifica&ccedil;&otilde;es nucleares, quando o n&uacute;cleo se torna mais volumoso e a <span id=\"urn:enhancement-b3ee376e-119e-48fb-8cb7-a28a0e330eea\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/carioteca\">carioteca<\/span> (<span id=\"urn:enhancement-8392bc1c-acc0-4dc4-861f-7e183ce15d97\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/carioteca\">envolt&oacute;rio nuclear<\/span>) fica mais fr&aacute;gil que o normal. Nesse sentido,o n&uacute;cleo da c&eacute;lula passa a ter um aspecto mais denso e &eacute; mais f&aacute;cil para os cientistas observarem-no atrav&eacute;s de microscopia eletr&ocirc;nica.&nbsp;<\/p><p class=\"wp-block-paragraph\">A cromatina, local onde s&atilde;o armazenadas as informa&ccedil;&otilde;es gen&eacute;ticas, torna-se mais espiralizada, sob a a&ccedil;&atilde;o de prote&iacute;nas especializadas da <span id=\"urn:enhancement-26ddbec1-b164-4a17-9202-644c9551f47f\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span>. Nesse sentido, um fio longo de informa&ccedil;&atilde;o nucleica &eacute; transformado em pequenos aglomerados cromoss&ocirc;micos.&nbsp;<\/p><p class=\"wp-block-paragraph\">Ao mesmo tempo, o nucl&eacute;olo, importante <a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/organelas-celulares\/\" target=\"_blank\">organela <\/a>na constitui&ccedil;&atilde;o ribossomal, desaparece. Perceba que, com a espiraliza&ccedil;&atilde;o e condensa&ccedil;&atilde;o do material gen&eacute;tico, n&atilde;o haver&atilde;o mais informa&ccedil;&otilde;es necess&aacute;rias para a s&iacute;ntese de <span id=\"urn:enhancement-b6137fbf-a3ae-48bc-b017-93caa4c7db0c\" class=\"textannotation disambiguated wl-creative-work\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/rna\">RNA<\/span> ou prote&iacute;nas. Dessa forma, o nucl&eacute;olo n&atilde;o ter&aacute; mais uma fun&ccedil;&atilde;o espec&iacute;fica e pode se desintegrar.&nbsp;<\/p><p class=\"wp-block-paragraph\">Em rela&ccedil;&atilde;o ao <span id=\"urn:enhancement-32944e88-24cc-43c0-9908-03ff08c686f4\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/citoplasma\">citoplasma<\/span>, podem ser notadas altera&ccedil;&otilde;es em quase todas as <span id=\"urn:enhancement-87230439-047e-457b-9874-16992f1cf6ef\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/organela\">organelas<\/span>. Por exemplo, o centr&iacute;olo &eacute; formado por microt&uacute;bulos de prote&iacute;nas e permite a arquitetura <span id=\"urn:enhancement-5db4c552-bc0d-4a37-a0ed-31dc684eb4df\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/citoplasma\">citoplasm&aacute;tica<\/span>, organizando a estrutura da c&eacute;lula.&nbsp;<\/p><p class=\"wp-block-paragraph\">Durante a <span id=\"urn:enhancement-a05342e9-392d-4498-8a76-c84126873faa\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span>, esses centr&iacute;olos s&atilde;o duplicados, para tornarem-se estruturas suporte para o <span id=\"urn:enhancement-958b233e-a814-4a46-80c2-75d65a30fa38\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/citoplasma\">citoplasma<\/span> das c&eacute;lulas filhas que v&atilde;o nascer dessa <span id=\"urn:enhancement-afd6c8f4-8dbf-4f2c-ae24-5e8c49ff9348\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/divisao-celular\">divis&atilde;o celular<\/span>. Em meio &agrave; <span id=\"urn:enhancement-a24d832b-128a-4552-b747-d81168d9ae1a\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/mitose\">mitose<\/span>, essas <span id=\"urn:enhancement-68fae94a-7890-4a73-9634-f6ba69ea479d\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/organela\">organelas<\/span> tamb&eacute;m s&atilde;o respons&aacute;veis por se posicionar em cada polo citoplasm&aacute;tico e formar o fuso mit&oacute;tico, sistema que organiza os cromossomos para a separa&ccedil;&atilde;o <span id=\"urn:enhancement-90eeee58-d1ff-4536-8979-a862c0c891a3\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/genetica\">gen&eacute;tica<\/span>.<\/p><p class=\"wp-block-paragraph\">Simultaneamente, observa-se uma desintegra&ccedil;&atilde;o marcante de <span id=\"urn:enhancement-dffd5470-7679-438f-b7ca-416f798ef2cb\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/organela\">organelas<\/span> como os ret&iacute;culos endoplasm&aacute;tico liso e rugoso, al&eacute;m do complexo de Golgi. Estruturas celulares como cloroplastos e <span id=\"urn:enhancement-88cf2179-8c5e-41c3-8649-3f0e9032bd10\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/mitocondrias\">mitoc&ocirc;ndrias<\/span>, ambas participantes de teoria de surgimento endossimbionte, n&atilde;o s&atilde;o alteradas durante a <span id=\"urn:enhancement-75b1bb9d-187f-4e69-ac59-86a028eee4c2\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span>, no <span id=\"urn:enhancement-8011f7e3-7fad-40fd-bcf4-ab813f4c891d\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/ciclo-celular\">ciclo celular<\/span>.<\/p><p class=\"wp-block-paragraph\">Mas, afinal, como toda essa informa&ccedil;&atilde;o <span id=\"urn:enhancement-f4daf9fb-ccc1-4fea-843c-262bc215d633\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/genetica\">gen&eacute;tica<\/span> pode ficar dispersa no <span id=\"urn:enhancement-82a45be8-fcdb-4b4d-ad39-30489a3fbf22\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/citoplasma\">citoplasma<\/span> para que ocorra <span id=\"urn:enhancement-87a6f0c2-f882-4e24-b6d6-62e6ed3472ca\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/divisao-celular\">divis&atilde;o celular<\/span>? A verdade &eacute; que o n&uacute;cleo das c&eacute;lulas <span id=\"urn:enhancement-ab89a306-2118-41ed-bd7a-81864a066712\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/eucariontes\">eucariontes<\/span> &eacute; envolto por uma camada de <span id=\"urn:enhancement-f6f8522d-fd9e-4dac-9c49-de223e459f34\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/membrana\">membrana<\/span> chamada de <span id=\"urn:enhancement-33c0d18e-ee79-4527-a56c-79c9c1b5ced9\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/carioteca\">carioteca<\/span>, j&aacute; mencionada anteriormente.&nbsp;<\/p><p class=\"wp-block-paragraph\">Nota-se que, durante a <span id=\"urn:enhancement-d3264955-9438-4e86-8622-59e1c4e5a0b3\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span>, esse <span id=\"urn:enhancement-9cf9e886-ed8e-4ed4-ae52-f5e4aac51232\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/carioteca\">envolt&oacute;rio nuclear<\/span> &eacute; rompido e forma v&aacute;rias ves&iacute;culas, que se mant&ecirc;m no <span id=\"urn:enhancement-7c623fc8-b7c0-4378-b358-dd80d789cc6d\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/citoplasma\">citoplasma<\/span> para originarem estruturas semelhantes ao final do processo, quando as duas c&eacute;lulas filhas se organizam.<\/p><h2 class=\"wp-block-heading\" id=\"h-profase-da-mitose-e-da-meiose\"><span class=\"ez-toc-section\" id=\"Profase-da-mitose-e-da-meiose\"><\/span>Pr&oacute;fase da mitose e da meiose<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">A <span id=\"urn:enhancement-cfddf562-e27f-4db9-88bc-8f601ec4acc5\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> &eacute; uma fase do <span id=\"urn:enhancement-81fea699-a156-419c-a2d3-67b746d52839\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/ciclo-celular\">ciclo celular<\/span> que n&atilde;o apresenta muitas diferen&ccedil;as em rela&ccedil;&atilde;o aos dois tipos de <span id=\"urn:enhancement-cfced6cd-646a-42ea-b32e-b73a73a8a0d1\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/divisao-celular\">divis&atilde;o celular<\/span>. Tanto na <span id=\"urn:enhancement-84b4a388-75e2-49ed-b771-85b3348ec47a\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/mitose\">mitose<\/span> quanto na <span id=\"urn:enhancement-fda87714-a167-47b9-afc0-a3bb328ba8d8\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/meiose\">meiose<\/span>, as fun&ccedil;&otilde;es s&atilde;o semelhantes, quanto &agrave; forma&ccedil;&atilde;o das estruturas e prepara&ccedil;&atilde;o para os processos subsequentes.<\/p><p class=\"wp-block-paragraph\">Apesar disso, &eacute; importante ressaltar que a <span id=\"urn:enhancement-b4eef622-0d03-4e8f-8ee4-1c2950ea8ed2\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/mitose\">mitose<\/span> &eacute; um processo cont&iacute;nuo finaliza todas as etapas com apenas uma <span id=\"urn:enhancement-379de820-708f-45bf-bed6-9721e8b178b8\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/divisao-celular\">divis&atilde;o celular<\/span>, gerando duas c&eacute;lulas filhas de caracter&iacute;sticas id&ecirc;nticas &agrave; original.&nbsp;<\/p><p class=\"wp-block-paragraph\">Do outro lado, a <span id=\"urn:enhancement-796f11e8-bd7a-4b18-a058-79027b60e6c3\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/meiose\">meiose<\/span> &eacute; um processo reducional, que ocorre em c&eacute;lulas gam&eacute;ticas e t&ecirc;m a fun&ccedil;&atilde;o de reduzir a quantidade de carga <span id=\"urn:enhancement-4a30e78d-9521-4cf7-ae34-72da831d8d5a\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/genetica\">gen&eacute;tica<\/span> em cada c&eacute;lula filha, propiciando a manuten&ccedil;&atilde;o da quantidade de cromossomos na prole daquele indiv&iacute;duo.<\/p><p class=\"wp-block-paragraph\">Devido a essa peculiaridade, a <span id=\"urn:enhancement-bc21452d-bb23-4693-b39b-a72212ce1039\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/meiose\">meiose<\/span> possui duas fases de <span id=\"urn:enhancement-2bd0546a-0154-4e2f-8e10-be6c9cb20fbb\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span>. A <span id=\"urn:enhancement-f501d708-69f7-40bd-9227-8442d350beb1\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> I e a <span id=\"urn:enhancement-4b60eb30-0555-4931-9498-9e73f1bc224c\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> II, como veremos a seguir.&nbsp;<\/p><p class=\"wp-block-paragraph\">+ Veja tamb&eacute;m: <a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/mitose-e-meiose\/\" target=\"_blank\">Mitose e meiose: o que s&atilde;o, diferen&ccedil;as e import&acirc;ncia<\/a><\/p><h3 class=\"wp-block-heading\" id=\"h-profase-i\">Pr&oacute;fase I<\/h3><p class=\"wp-block-paragraph\">A primeira <span id=\"urn:enhancement-e2e64467-5082-4935-a502-24ca6c114aa9\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> pode ser subdividida em diferentes etapas. A primeira delas &eacute; o lept&oacute;teno, na qual &eacute; observada uma condensa&ccedil;&atilde;o crescente dos cromossomos, at&eacute; que entra na segunda fase, o zig&oacute;teno.<\/p><p class=\"wp-block-paragraph\">O processo cromoss&ocirc;mico que ocorre no zig&oacute;teno pode ser comparado a um z&iacute;per. As mol&eacute;culas presentes entre os cromossomos e os est&iacute;mulos da c&eacute;lula em divis&atilde;o fazem com que os cromossomos hom&oacute;logos se alinhem e formem uma estrutura de controle chamada de complexo sinapton&ecirc;mico.&nbsp;<\/p><p class=\"wp-block-paragraph\">Em seguida, a <span id=\"urn:enhancement-1fdc379a-6326-4e12-a65f-c876400014e1\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> I encaminha-se para a subfase paqu&iacute;teno. Aqui, o grau de condensa&ccedil;&atilde;o dos cromossomos &eacute; bem mais evidente e, ao microsc&oacute;pio, &eacute; poss&iacute;vel observar que cada cromossomo hom&oacute;logo possui duas crom&aacute;tides irm&atilde;s, somando um total de 4 crom&aacute;tides.<\/p><p class=\"wp-block-paragraph\">No paqu&iacute;teno da primeira <span id=\"urn:enhancement-865f2e4e-9547-4e9c-86bf-83e1a84699aa\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> mei&oacute;tica acontece o evento mais importante dessa <span id=\"urn:enhancement-1fa81f7e-5cd9-4a58-a618-baeebd089b8d\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/divisao-celular\">divis&atilde;o celular<\/span>, em termos de variabilidade <span id=\"urn:enhancement-97a0b5e9-8b23-4832-8278-f441460434d6\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/genetica\">gen&eacute;tica<\/span>. &Eacute; durante essa fase do ciclo que os cromossomos hom&oacute;logos realizam a troca de informa&ccedil;&atilde;o <span id=\"urn:enhancement-4e32daa8-ea77-4294-816f-b4ef7771d33e\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/genetica\">gen&eacute;tica<\/span>, processo conhecido como <span id=\"urn:enhancement-75533f4f-9b56-49e0-88d1-f6b22665fe0f\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/crossing-over\">crossing-over<\/span>.&nbsp;<\/p><p class=\"wp-block-paragraph\">A pancement-75533f4f-9b56-49e0-88d1-f6b22665fe0f&rdquo; class=&rdquo;textannotation&rdquo;&gt;r&oacute;xima etapa &eacute; o dipl&oacute;teno, em que come&ccedil;a a separa&ccedil;&atilde;o entre os cromossomos hom&oacute;logos. Por fim, a &uacute;ltima fase da pr&oacute;fase I &eacute; a diacinese, quando o material gen&eacute;tico fica ainda mais condensado do que nos n&iacute;veis anteriores e o fuso de divis&atilde;o come&ccedil;a a se formar.<\/p><h4 class=\"wp-block-heading\" id=\"h-importancia\">Import&acirc;ncia<\/h4><p class=\"wp-block-paragraph\">Na esp&eacute;cie humana, os &oacute;vulos femininos n&atilde;o passam por uma completa <span id=\"urn:enhancement-e43c145f-af71-4975-b61c-cd414d2ce352\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/divisao-celular\">divis&atilde;o celular<\/span> mei&oacute;tica em primeiro momento. Durante o desenvolvimento <span id=\"urn:enhancement-87dfdf93-09d5-45d5-964a-dc1159ba0bb9\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/embriao\">embrion&aacute;rio<\/span>, esses &oacute;vulos come&ccedil;am a <span id=\"urn:enhancement-82b7b757-8b40-4cb1-bb1c-fde67d98a994\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/divisao-celular\">divis&atilde;o celular<\/span> e se estacionam na <span id=\"urn:enhancement-3788e58e-b53d-40a8-ab25-9d8f43db0651\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> I, mais especificamente no dipl&oacute;teno. Essa <span id=\"urn:enhancement-648509a9-5178-455b-ab5d-34419254d42a\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/meiose\">meiose<\/span> s&oacute; ter&aacute; continuidade durante a puberdade, quando a libera&ccedil;&atilde;o de horm&ocirc;nios sexuais reestimula esse processo.<\/p><h3 class=\"wp-block-heading\" id=\"h-profase-ii\">Pr&oacute;fase II<\/h3><p class=\"wp-block-paragraph\">As etapas da <span id=\"urn:enhancement-b0318bd0-9d7b-478f-b82f-1973909310c5\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> II s&atilde;o extremamente semelhantes ao que foi mencionado no t&oacute;pico anterior. A principal distin&ccedil;&atilde;o &eacute; que n&atilde;o ocorre <span id=\"urn:enhancement-8f41d668-3fe1-43e9-b353-d6a9fc99fd49\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/crossing-over\">crossing over<\/span> no paqu&iacute;teno da <span id=\"urn:enhancement-740e4b45-435e-402b-a688-85ee50346432\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> II &mdash; ent&atilde;o, de certa forma, essa segunda ocorr&ecirc;ncia de <span id=\"urn:enhancement-7363f24e-4775-404e-acb5-d089206e29be\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> n&atilde;o &eacute; t&atilde;o determinante em termos de variabilidade da informa&ccedil;&atilde;o <span id=\"urn:enhancement-c061efc5-b6c2-419d-95b4-9108ebcf9bf4\" class=\"textannotation disambiguated wl-thing\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/genetica\">gen&eacute;tica<\/span>.&nbsp;<\/p><p class=\"wp-block-paragraph\">+ Veja tamb&eacute;m: <a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/bioquimica-celular\/\" target=\"_blank\">Bioqu&iacute;mica celular: o que &eacute;, organelas, metabolismo e mais<\/a><\/p><h2 class=\"wp-block-heading\" id=\"h-questao-de-vestibular\"><span class=\"ez-toc-section\" id=\"Questao-de-vestibular\"><\/span>Quest&atilde;o de vestibular<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">(<a href=\"https:\/\/www.acafe.org.br\/\" target=\"_blank\">Acafe<\/a>-SC) A sequ&ecirc;ncia das subfases da <span id=\"urn:enhancement-3d23dcf5-7da3-4d2b-9a79-e2d5089bb6ce\" class=\"textannotation disambiguated wl-thing wl-no-link\" itemid=\"https:\/\/data.wordlift.io\/wl110249\/entity\/profase\">pr&oacute;fase<\/span> I &eacute;:<\/p><p class=\"wp-block-paragraph\">a) Lept&oacute;teno, dipl&oacute;teno, paqu&iacute;teno, zig&oacute;teno, diacinese.<br>b) Lept&oacute;teno, dipl&oacute;teno, paqu&iacute;teno, diacinese, zig&oacute;teno.<br>c) Lept&oacute;teno, zig&oacute;teno, paqu&iacute;teno, diacinese, dipl&oacute;teno.<br><strong>d) Lept&oacute;teno, zig&oacute;teno, paqu&iacute;teno, dipl&oacute;teno, diacinese.<\/strong><br>e) Lept&oacute;teno, paqu&iacute;teno, zig&oacute;teno, dipl&oacute;teno, diacinese.<\/p><h2 class=\"wp-block-heading\" id=\"h-estude-para-o-vestibular-com-a-coruja\"><span class=\"ez-toc-section\" id=\"Estude-para-o-vestibular-com-a-Coruja\"><\/span>Estude para o vestibular com a Coruja!<span class=\"ez-toc-section-end\"><\/span><\/h2><p class=\"wp-block-paragraph\">O Estrat&eacute;gia Vestibulares &eacute; o seu melhor suporte durante todo o processo seletivo, veja o que diz Renan Gonzales, aprovado em Ci&ecirc;ncia de Dados na USP em 2021: &ldquo;O Estrat&eacute;gia me deu todo o suporte necess&aacute;rio para que eu conseguisse chegar at&eacute; a primeira fase. A partir da primeira fase, quando saiu a lista de convoca&ccedil;&atilde;o, poucos dias depois voc&ecirc;s lan&ccedil;aram aulas para a segunda fase, que eu considero um diferencial absoluto&rdquo;. Clique no banner e aumente voc&ecirc; tamb&eacute;m as chances de ser aprovado!&nbsp;<\/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\/materias\/biologia\/mitose-e-meiose\/\">Mitose e meiose<\/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\/materias\/biologia\/membrana-plasmatica\/\">Membrana Plasm&aacute;tica: qual a fun&ccedil;&atilde;o e suas caracter&iacute;sticas?<\/a><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/reticulo-endoplasmatico\/\">Ret&iacute;culo endoplasm&aacute;tico: granular e liso, fun&ccedil;&otilde;es e estrutura<\/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><\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/lipidios\/\">Lip&iacute;dios: o que s&atilde;o, exemplos, estrutura, solubilidade e quest&otilde;es<\/a>&nbsp;<\/li>\n\n\n\n<li><a href=\"https:\/\/vestibulares.estrategia.com\/portal\/materias\/biologia\/proteinas\/\">Prote&iacute;nas: o que s&atilde;o, estrutura, caracter&iacute;sticas e aplica&ccedil;&otilde;es<\/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<\/ul><\/p>\n","protected":false},"excerpt":{"rendered":"A pr&oacute;fase &eacute; a primeira fase da divis&atilde;o celular, que acontece na mitose e na meiose, como um&hellip;\n","protected":false},"author":23,"featured_media":86122,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[31],"tags":[],"class_list":["post-84714","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>Pr\u00f3fase: o que \u00e9, resumo, pr\u00f3fase I e II, quest\u00f5es<\/title>\n<meta name=\"description\" content=\"Leia este artigo e entenda as altera\u00e7\u00f5es que ocorrem em uma c\u00e9lula durante a pr\u00f3fase, tanto na mitose, como na 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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