{"id":199808,"date":"2025-03-12T16:02:40","date_gmt":"2025-03-12T16:02:40","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=199808"},"modified":"2025-03-12T16:02:43","modified_gmt":"2025-03-12T16:02:43","slug":"what-is-the-percentage-of-each-genotypic-and-phenotypic-if-a-black-individual-is-crossed-with-a-bluish-gray-individual","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/12\/what-is-the-percentage-of-each-genotypic-and-phenotypic-if-a-black-individual-is-crossed-with-a-bluish-gray-individual\/","title":{"rendered":"What is the percentage of each genotypic and phenotypic if a black individual is crossed with a bluish-gray individual"},"content":{"rendered":"\n

What is the percentage of each genotypic and phenotypic if a black individual is crossed with a bluish-gray individual ?<\/p>\n\n\n\n

The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n

To determine the genotypic and phenotypic percentages when a black individual is crossed with a bluish-gray individual, we need to analyze the inheritance pattern.<\/p>\n\n\n\n

Assumptions:<\/h3>\n\n\n\n
    \n
  1. Coat Color Inheritance:<\/strong> In many animals, including livestock and dogs, black (B) is often dominant over dilute colors such as bluish-gray (b), which is recessive.<\/li>\n\n\n\n
  2. Genotypes:<\/strong><\/li>\n<\/ol>\n\n\n\n
      \n
    • A black individual could be BB (homozygous dominant)<\/strong> or Bb (heterozygous)<\/strong>.<\/li>\n\n\n\n
    • A bluish-gray individual must be bb (homozygous recessive)<\/strong> because the recessive trait only appears when two recessive alleles are present.<\/li>\n<\/ul>\n\n\n\n

      Possible Crosses and Outcomes:<\/h3>\n\n\n\n

      Case 1: If the black parent is BB (homozygous dominant)<\/strong><\/h4>\n\n\n\n
        \n
      • Cross: BB \u00d7 bb<\/strong><\/li>\n\n\n\n
      • Punnett Square: B B b Bb Bb b Bb Bb<\/li>\n\n\n\n
      • Genotypic Ratio:<\/strong> 100% Bb (heterozygous)<\/li>\n\n\n\n
      • Phenotypic Ratio:<\/strong> 100% Black (since Bb shows the dominant black trait)<\/li>\n<\/ul>\n\n\n\n

        Case 2: If the black parent is Bb (heterozygous)<\/strong><\/h4>\n\n\n\n
          \n
        • Cross: Bb \u00d7 bb<\/strong><\/li>\n\n\n\n
        • Punnett Square: B b b Bb bb b Bb bb<\/li>\n\n\n\n
        • Genotypic Ratio:<\/strong>\n
            \n
          • 50% Bb (heterozygous, black)<\/li>\n\n\n\n
          • 50% bb (homozygous recessive, bluish-gray)<\/li>\n<\/ul>\n<\/li>\n\n\n\n
          • Phenotypic Ratio:<\/strong>\n
              \n
            • 50% Black<\/li>\n\n\n\n
            • 50% Bluish-gray<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n

              Final Answer:<\/h3>\n\n\n\n
                \n
              • If the black parent is BB<\/strong>, the offspring will be 100% Black<\/strong>.<\/li>\n\n\n\n
              • If the black parent is Bb<\/strong>, the offspring will be 50% Black and 50% Bluish-gray<\/strong>.<\/li>\n<\/ul>\n\n\n\n

                Explanation:<\/h3>\n\n\n\n

                The inheritance of coat color follows Mendelian genetics, where a dominant allele (B) masks the effect of the recessive allele (b). If the black individual is homozygous (BB), all offspring inherit at least one dominant B allele, making them black. However, if the black individual is heterozygous (Bb), there is a 50% chance<\/strong> of passing the recessive b allele, resulting in some bluish-gray offspring. Understanding genetics helps in predicting offspring traits, which is useful in animal breeding and conservation genetics.<\/p>\n","protected":false},"excerpt":{"rendered":"

                What is the percentage of each genotypic and phenotypic if a black individual is crossed with a bluish-gray individual ? The correct answer and explanation is : To determine the genotypic and phenotypic percentages when a black individual is crossed with a bluish-gray individual, we need to analyze the inheritance pattern. Assumptions: Possible Crosses and […]<\/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-199808","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/199808","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=199808"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/199808\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=199808"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=199808"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=199808"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}