{"id":251762,"date":"2025-07-10T19:50:34","date_gmt":"2025-07-10T19:50:34","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=251762"},"modified":"2025-07-10T19:50:36","modified_gmt":"2025-07-10T19:50:36","slug":"which-of-the-following-causes-an-extra-copy-of-a-chromosomal-region-to-occur","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/10\/which-of-the-following-causes-an-extra-copy-of-a-chromosomal-region-to-occur\/","title":{"rendered":"Which of the following causes an extra copy of a chromosomal region to occur"},"content":{"rendered":"\n<p>Which of the following causes an extra copy of a chromosomal region to occur? <\/p>\n\n\n\n<p>Multiple Choice <\/p>\n\n\n\n<p>inversion. <\/p>\n\n\n\n<p>deletion. <\/p>\n\n\n\n<p>duplication. <\/p>\n\n\n\n<p>simple translocation. <\/p>\n\n\n\n<p>reciprocal translocation.<\/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>duplication<\/strong>.<\/p>\n\n\n\n<p><strong>Explanation<\/strong>:<br>Duplication refers to a chromosomal mutation where a segment of a chromosome is copied and inserted into the same chromosome or into another chromosome. This results in an extra copy of a specific region, increasing the number of certain genes or genetic material. This can occur during DNA replication, where a part of the chromosome may be accidentally duplicated.<\/p>\n\n\n\n<p>The consequences of duplication can vary. If the duplicated region contains important genes, the organism may experience changes in gene expression, potentially leading to developmental changes, disorders, or evolutionary advantages. The additional genetic material can also lead to errors in the pairing of homologous chromosomes during cell division, contributing to genetic diversity or disease.<\/p>\n\n\n\n<p>Now, let\u2019s differentiate it from the other options:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Inversion<\/strong>: In this mutation, a segment of the chromosome is reversed end-to-end. This does not create an extra copy of any chromosomal region but alters the orientation of a specific part of the chromosome.<\/li>\n\n\n\n<li><strong>Deletion<\/strong>: Deletion involves the loss of a chromosome segment. Unlike duplication, there is no extra copy of the region; the material is simply missing.<\/li>\n\n\n\n<li><strong>Simple Translocation<\/strong>: This occurs when a chromosome segment is transferred to a non-homologous chromosome. There is no duplication of genetic material, only rearrangement.<\/li>\n\n\n\n<li><strong>Reciprocal Translocation<\/strong>: This is a form of genetic exchange between two non-homologous chromosomes, where segments from each chromosome are swapped. Like simple translocation, it does not result in duplication but in rearrangement.<\/li>\n<\/ul>\n\n\n\n<p>Therefore, duplication specifically results in the presence of an extra copy of a chromosomal region, distinguishing it from other chromosomal mutations.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Which of the following causes an extra copy of a chromosomal region to occur? Multiple Choice inversion. deletion. duplication. simple translocation. reciprocal translocation. The correct answer and explanation is: The correct answer is duplication. Explanation:Duplication refers to a chromosomal mutation where a segment of a chromosome is copied and inserted into the same chromosome or [&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-251762","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/251762","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=251762"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/251762\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=251762"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=251762"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=251762"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}