{"id":17019,"date":"2025-06-12T07:16:00","date_gmt":"2025-06-12T07:16:00","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=17019"},"modified":"2025-06-12T07:16:01","modified_gmt":"2025-06-12T07:16:01","slug":"if-the-parental-lines-are-vgpr-and-vgpr","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/if-the-parental-lines-are-vgpr-and-vgpr\/","title":{"rendered":"If the parental lines are vg+pr and vgpr+"},"content":{"rendered":"\n<p>If the parental lines are vg+pr and vgpr+, what allele combinations would be expected in the recombinant genes?<\/p>\n\n\n\n<p class=\"has-text-align-left\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\"><strong>The correct answer and explanation is:<\/strong><\/mark><\/p>\n\n\n\n<p>Sure! Let&#8217;s break this down step by step.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Question Restatement:<\/h3>\n\n\n\n<p>Parental lines are <strong>vg+ pr<\/strong> and <strong>vg pr+<\/strong>.<br>What allele combinations would be expected in the <strong>recombinant genes<\/strong>?<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Answer:<\/h3>\n\n\n\n<p>The <strong>parental genotypes<\/strong> are:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>vg+ pr<\/li>\n\n\n\n<li>vg pr+<\/li>\n<\/ul>\n\n\n\n<p>Since these are <strong>linked genes<\/strong> on the same chromosome, the parental chromosomes are:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>One chromosome: vg+ (wild type for vg) and pr (mutant for pr)<\/li>\n\n\n\n<li>The other chromosome: vg (mutant for vg) and pr+ (wild type for pr)<\/li>\n<\/ul>\n\n\n\n<p>The <strong>recombinant genotypes<\/strong> will be the new combinations formed by crossing over between these two linked genes:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>vg+ pr+<\/li>\n\n\n\n<li>vg pr<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>In genetic crosses involving two linked genes, the parental alleles are found together on the same chromosome, inherited as a block unless crossing over occurs during meiosis. The parental alleles here are vg+ paired with pr, and vg paired with pr+. The &#8220;+&#8221; denotes the wild-type (normal) allele, and the others (vg, pr) are mutant alleles.<\/p>\n\n\n\n<p>Because the genes vg (vestigial wings) and pr (purple eyes) are linked, the parental chromosomes are:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Chromosome 1: vg+ (normal wing) and pr (mutant eye)<\/li>\n\n\n\n<li>Chromosome 2: vg (mutant wing) and pr+ (normal eye)<\/li>\n<\/ul>\n\n\n\n<p>When a crossover event happens between the vg and pr loci during meiosis, the alleles are exchanged, producing recombinant chromosomes with new allele combinations that differ from the parents.<\/p>\n\n\n\n<p>Recombinant chromosomes will carry:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>vg+ pr+ (both wild-type alleles)<\/li>\n\n\n\n<li>vg pr (both mutant alleles)<\/li>\n<\/ul>\n\n\n\n<p>This occurs because the crossover swaps alleles between the homologous chromosomes.<\/p>\n\n\n\n<p>To summarize:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Chromosome type<\/th><th>Allele combination<\/th><th>Parental or Recombinant?<\/th><\/tr><\/thead><tbody><tr><td>vg+ pr<\/td><td>Parental<\/td><td><\/td><\/tr><tr><td>vg pr+<\/td><td>Parental<\/td><td><\/td><\/tr><tr><td>vg+ pr+<\/td><td>Recombinant<\/td><td><\/td><\/tr><tr><td>vg pr<\/td><td>Recombinant<\/td><td><\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>These recombinant genotypes arise at a frequency proportional to the recombination rate between the two genes, which depends on their physical distance on the chromosome. If the genes are close, recombinant offspring are fewer; if far apart, recombination frequency increases.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n","protected":false},"excerpt":{"rendered":"<p>If the parental lines are vg+pr and vgpr+, what allele combinations would be expected in the recombinant genes? The correct answer and explanation is: Sure! Let&#8217;s break this down step by step. Question Restatement: Parental lines are vg+ pr and vg pr+.What allele combinations would be expected in the recombinant genes? Answer: The parental genotypes [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-17019","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/17019","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=17019"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/17019\/revisions"}],"predecessor-version":[{"id":17020,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/17019\/revisions\/17020"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=17019"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=17019"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=17019"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}