{"id":242381,"date":"2025-07-04T07:18:06","date_gmt":"2025-07-04T07:18:06","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=242381"},"modified":"2025-07-04T07:18:17","modified_gmt":"2025-07-04T07:18:17","slug":"an-albino-female-deer-aa-breeds-with-a-homozygous-normal-aa-male","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/04\/an-albino-female-deer-aa-breeds-with-a-homozygous-normal-aa-male\/","title":{"rendered":"An albino female deer (aa) breeds with a homozygous normal (AA) male"},"content":{"rendered":"\n<p>An albino female deer (aa) breeds with a homozygous normal (AA) male. What are the percentages of each phenotype?<\/p>\n\n\n\n<p> A. 100% Albino <\/p>\n\n\n\n<p>B. 50% Brown; 50% Albino<\/p>\n\n\n\n<p> C. 75% Brown; 25% Albino <\/p>\n\n\n\n<p>D. 25% Brown; 75% Albino <\/p>\n\n\n\n<p>E. 100% Brown<\/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>B. 50% Brown; 50% Albino<\/strong>.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>In this scenario, the albino deer is homozygous recessive (aa) and the normal deer is homozygous dominant (AA). To understand the offspring&#8217;s phenotype, we need to analyze the potential genotypes resulting from the cross between these two animals.<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Parental Genotypes<\/strong>:\n<ul class=\"wp-block-list\">\n<li>Albino female: <strong>aa<\/strong> (recessive for albinism)<\/li>\n\n\n\n<li>Homozygous normal male: <strong>AA<\/strong> (dominant for normal pigmentation)<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Gametes<\/strong>:\n<ul class=\"wp-block-list\">\n<li>The albino female can only produce <strong>a<\/strong> gametes because she is aa.<\/li>\n\n\n\n<li>The homozygous normal male can only produce <strong>A<\/strong> gametes because he is AA.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>F1 Generation (Offspring)<\/strong>:<br>When the female and male mate, each offspring will inherit one allele from each parent:\n<ul class=\"wp-block-list\">\n<li>The female will contribute <strong>a<\/strong>.<\/li>\n\n\n\n<li>The male will contribute <strong>A<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<\/ol>\n\n\n\n<p>Thus, all the offspring will have the genotype <strong>Aa<\/strong> (heterozygous). Since <strong>A<\/strong> is dominant over <strong>a<\/strong>, all the offspring will express the normal brown color, as the presence of at least one dominant allele (A) results in normal pigmentation.<\/p>\n\n\n\n<p>However, the <strong>albino phenotype<\/strong> is recessive, meaning it will only be expressed if the genotype is <strong>aa<\/strong>. Since all offspring are <strong>Aa<\/strong>, none of them will be albino, and they will all be brown.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Punnett Square Analysis:<\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th><\/th><th>A (from male)<\/th><th>A (from male)<\/th><\/tr><\/thead><tbody><tr><td>a (from female)<\/td><td>Aa<\/td><td>Aa<\/td><\/tr><tr><td>a (from female)<\/td><td>Aa<\/td><td>Aa<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>All offspring are <strong>Aa<\/strong>, so they will have the <strong>brown<\/strong> phenotype. Therefore, the correct percentage of each phenotype is:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>100% <strong>Brown<\/strong>. The correct answer is <strong>E<\/strong>, and the previous analysis is based on the cross provided.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>An albino female deer (aa) breeds with a homozygous normal (AA) male. What are the percentages of each phenotype? A. 100% Albino B. 50% Brown; 50% Albino C. 75% Brown; 25% Albino D. 25% Brown; 75% Albino E. 100% Brown The correct answer and explanation is: The correct answer is B. 50% Brown; 50% Albino. [&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-242381","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/242381","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=242381"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/242381\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=242381"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=242381"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=242381"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}