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Homozygous polled bull and scurs
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<blockquote data-quote="Jeanne - Simme Valley" data-source="post: 1517021" data-attributes="member: 968"><p>You are incorrect. Females MUST inherit two scur traits to be expressed.</p><p>"Presence of scurs (typically small, movable, hollow pseudo horns) only occurs in heterozygous polled animals (carry one polled allele and one horned allele, Pp). Scurred is also a sex linked trait meaning the <strong>genetic inheritance is controlled differently in males than females</strong>. Scurs is a dominant trait in bulls meaning bulls only need one copy of the scurred allele to have scurs. Scurs is a <strong>recessive trait in females </strong>meaning a cow needs to have two copies of the scurred allele to display the phenotype (see below for possible genotypes and resulting phenotypes for the horned, polled, or scurred conditions)."</p><p><a href="https://asascienceblog.wordpress.com/2015/11/04/hornedpolledscurred-an-example-of-complete-dominance-epistasis-and-a-sex-influenced-trait/" target="_blank">https://asascienceblog.wordpress.com/20 ... ced-trait/</a></p></blockquote><p></p>
[QUOTE="Jeanne - Simme Valley, post: 1517021, member: 968"] You are incorrect. Females MUST inherit two scur traits to be expressed. "Presence of scurs (typically small, movable, hollow pseudo horns) only occurs in heterozygous polled animals (carry one polled allele and one horned allele, Pp). Scurred is also a sex linked trait meaning the [b]genetic inheritance is controlled differently in males than females[/b]. Scurs is a dominant trait in bulls meaning bulls only need one copy of the scurred allele to have scurs. Scurs is a [b]recessive trait in females [/b]meaning a cow needs to have two copies of the scurred allele to display the phenotype (see below for possible genotypes and resulting phenotypes for the horned, polled, or scurred conditions)." [url=https://asascienceblog.wordpress.com/2015/11/04/hornedpolledscurred-an-example-of-complete-dominance-epistasis-and-a-sex-influenced-trait/]https://asascienceblog.wordpress.com/20 ... ced-trait/[/url] [/QUOTE]
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