{"id":168369,"date":"2024-11-17T10:36:17","date_gmt":"2024-11-17T10:36:17","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=168369"},"modified":"2024-11-17T10:36:18","modified_gmt":"2024-11-17T10:36:18","slug":"a-cell-preparing-to-undergo-meiosis-duplicates-its-chromosomes-during","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2024\/11\/17\/a-cell-preparing-to-undergo-meiosis-duplicates-its-chromosomes-during\/","title":{"rendered":"A cell preparing to undergo meiosis duplicates its chromosomes during"},"content":{"rendered":"\n<p>A cell preparing to undergo meiosis duplicates its chromosomes during<br>A. prophase I.<br>B. anaphase I.<br>C. meiosis II.<br>D. interphase.<br>E. metaphase I.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>The correct answer is <strong>D. interphase<\/strong>.<\/p>\n\n\n\n<p>Meiosis is a type of cell division that reduces the chromosome number by half to produce gametes (sperm and eggs). The process occurs in two stages: meiosis I and meiosis II. Before meiosis begins, however, the cell undergoes interphase, which is a preparatory phase where the cell&#8217;s genetic material is duplicated.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>Interphase is the phase of the cell cycle during which the cell prepares for division. It is divided into three stages:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>G1 phase<\/strong> (first gap phase) \u2013 The cell grows and performs normal metabolic functions.<\/li>\n\n\n\n<li><strong>S phase<\/strong> (synthesis phase) \u2013 The DNA is replicated, meaning the chromosomes duplicate to form two identical chromatids for each chromosome.<\/li>\n\n\n\n<li><strong>G2 phase<\/strong> (second gap phase) \u2013 The cell continues to grow, and the proteins necessary for cell division are synthesized.<\/li>\n<\/ul>\n\n\n\n<p>The duplication of chromosomes occurs during the <strong>S phase<\/strong> of interphase, not during meiosis itself. At this point, each chromosome is made up of two sister chromatids connected by a centromere.<\/p>\n\n\n\n<p>Once interphase is complete, the cell enters <strong>meiosis I<\/strong>, which begins with <strong>prophase I<\/strong>. During prophase I, the homologous chromosomes (chromosomes with the same genes but possibly different alleles) pair up, undergo crossing-over (exchange of genetic material between homologs), and prepare for the separation of homologous chromosomes. However, no chromosome duplication occurs during this phase, as that process already occurred in interphase.<\/p>\n\n\n\n<p>During <strong>meiosis II<\/strong>, the sister chromatids are separated, but there is no chromosome duplication during this stage, as the chromosomes were already duplicated in interphase.<\/p>\n\n\n\n<p>Thus, <strong>interphase<\/strong> is the phase where chromosome duplication occurs, providing the necessary genetic material for the subsequent steps of meiosis.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A cell preparing to undergo meiosis duplicates its chromosomes duringA. prophase I.B. anaphase I.C. meiosis II.D. interphase.E. metaphase I. The Correct Answer and Explanation is: The correct answer is D. interphase. Meiosis is a type of cell division that reduces the chromosome number by half to produce gametes (sperm and eggs). The process occurs in [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-168369","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/168369","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=168369"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/168369\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=168369"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=168369"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=168369"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}