{"id":169985,"date":"2024-11-19T15:26:39","date_gmt":"2024-11-19T15:26:39","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=169985"},"modified":"2024-11-19T15:26:43","modified_gmt":"2024-11-19T15:26:43","slug":"big-foreheadsf-are-dominant-to-little-foreheads","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2024\/11\/19\/big-foreheadsf-are-dominant-to-little-foreheads\/","title":{"rendered":"Big foreheads(F) are dominant to little foreheads"},"content":{"rendered":"\n

Big foreheads(F) are dominant to little foreheads. A woman with a small
forehead marries a man with a big forehead. What is the probability the man
and woman’s children will have big foreheads? What is the probability of little
foreheads? Hint-you need to do two Punnett squares.<\/p>\n\n\n\n

The Correct Answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n

To solve this genetics problem, we need to use Punnett squares to determine the probabilities of the offspring inheriting big or small foreheads. Here’s the step-by-step explanation:<\/p>\n\n\n\n

Step 1: Understand the Genetics<\/strong><\/h3>\n\n\n\n
    \n
  • Big foreheads (F) are dominant.<\/li>\n\n\n\n
  • Little foreheads (f) are recessive.<\/li>\n\n\n\n
  • The woman has a small forehead, so her genotype must be ff<\/strong>.<\/li>\n\n\n\n
  • The man has a big forehead, so his genotype could be either FF<\/strong> (homozygous dominant) or Ff<\/strong> (heterozygous dominant). We don’t know his exact genotype, so we will consider both possibilities.<\/li>\n<\/ul>\n\n\n\n

    Step 2: Punnett Square 1 (Woman: ff, Man: Ff)<\/strong><\/h3>\n\n\n\n

    First, let’s assume the man is heterozygous (Ff). This is a common scenario, as most people with a big forehead have the genotype Ff.<\/p>\n\n\n\n

      \n
    • Woman’s genotype<\/strong>: ff<\/li>\n\n\n\n
    • Man’s genotype<\/strong>: Ff<\/li>\n<\/ul>\n\n\n\n

      The Punnett square for this cross would look like this:<\/p>\n\n\n\n

      <\/th>F<\/strong><\/th>f<\/strong><\/th><\/tr><\/thead>
      f<\/strong><\/td>Ff<\/td>ff<\/td><\/tr>
      f<\/strong><\/td>Ff<\/td>ff<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

      Results<\/strong>:<\/p>\n\n\n\n

        \n
      • 50% of the offspring (Ff) will have big foreheads (since F is dominant).<\/li>\n\n\n\n
      • 50% of the offspring (ff) will have little foreheads (since both alleles are recessive).<\/li>\n<\/ul>\n\n\n\n

        Probability of Big Forehead<\/strong>: 50%
        Probability of Little Forehead<\/strong>: 50%<\/p>\n\n\n\n

        Step 3: Punnett Square 2 (Woman: ff, Man: FF)<\/strong><\/h3>\n\n\n\n

        Now, let’s assume the man is homozygous dominant (FF).<\/p>\n\n\n\n

          \n
        • Woman’s genotype<\/strong>: ff<\/li>\n\n\n\n
        • Man’s genotype<\/strong>: FF<\/li>\n<\/ul>\n\n\n\n

          The Punnett square for this cross would look like this:<\/p>\n\n\n\n

          <\/th>F<\/strong><\/th>F<\/strong><\/th><\/tr><\/thead>
          f<\/strong><\/td>Ff<\/td>Ff<\/td><\/tr>
          f<\/strong><\/td>Ff<\/td>Ff<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

          Results<\/strong>:<\/p>\n\n\n\n

            \n
          • 100% of the offspring (Ff) will have big foreheads.<\/li>\n<\/ul>\n\n\n\n

            Probability of Big Forehead<\/strong>: 100%
            Probability of Little Forehead<\/strong>: 0%<\/p>\n\n\n\n

            Conclusion<\/strong>:<\/h3>\n\n\n\n
              \n
            • If the man is heterozygous (Ff), there’s a 50% chance the children will have big foreheads and a 50% chance they’ll have little foreheads.<\/li>\n\n\n\n
            • If the man is homozygous dominant (FF), all the children will have big foreheads, with no chance for little foreheads.<\/li>\n<\/ul>\n\n\n\n

              Thus, the probabilities depend on the father’s genotype, but the general range is a 50% chance of big foreheads and 50% chance of little foreheads if the man is heterozygous.<\/p>\n","protected":false},"excerpt":{"rendered":"

              Big foreheads(F) are dominant to little foreheads. A woman with a smallforehead marries a man with a big forehead. What is the probability the manand woman’s children will have big foreheads? What is the probability of littleforeheads? Hint-you need to do two Punnett squares. The Correct Answer and Explanation is : To solve this genetics […]<\/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-169985","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/169985","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=169985"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/169985\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=169985"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=169985"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=169985"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}