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scurred, polled, horned
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<blockquote data-quote="Anonymous" data-source="post: 14605"><p>I assume the heifer is polled. The scur gene is totally seperate from the horn gene, I haven't found any research on if the scur gene is dominant or recessive. We always just left scurs alone, sometimes they break them off, if they do and it takes a significant amount of tissue around them the will usually heal over with out scurs. The gene is still there but the manifestation of the gene is missing. We had an old cow with a scur on only one side, go figure. Now to the horned/polled deal. If you breed her to a homozygous polled bull, two polled genes, the calf will be polled. If she is heterozygous polled herself, one horned one polled gene, she will be polled and there is a 50:50 chance of which gene she will pass to her calf. If you breed her to a heterozygous polled bull, the calf may receive either a horned gene from the sire or a polled gene, and a horned gene or polled gene from the mother. So, if I do the math right, there is a 75% chance the calf will be polled and a 25% chance it will be horned.</p><p></p><p>> I have a heifer that is scurred.</p><p>> Her father is polled and her</p><p>> mother had horns. If I bred her to</p><p>> a bull with horns what will the</p><p>> calf have? If I bred her to a bull</p><p>> that is polled what will that calf</p><p>> have? How do these genes work? Why</p><p>> does my heifer have scurs? If she is homozygous polled, no matter what she is bred to she will have a polled calf. Ain't genetics fun?</p><p></p><p>dunmovin farms</p></blockquote><p></p>
[QUOTE="Anonymous, post: 14605"] I assume the heifer is polled. The scur gene is totally seperate from the horn gene, I haven't found any research on if the scur gene is dominant or recessive. We always just left scurs alone, sometimes they break them off, if they do and it takes a significant amount of tissue around them the will usually heal over with out scurs. The gene is still there but the manifestation of the gene is missing. We had an old cow with a scur on only one side, go figure. Now to the horned/polled deal. If you breed her to a homozygous polled bull, two polled genes, the calf will be polled. If she is heterozygous polled herself, one horned one polled gene, she will be polled and there is a 50:50 chance of which gene she will pass to her calf. If you breed her to a heterozygous polled bull, the calf may receive either a horned gene from the sire or a polled gene, and a horned gene or polled gene from the mother. So, if I do the math right, there is a 75% chance the calf will be polled and a 25% chance it will be horned. > I have a heifer that is scurred. > Her father is polled and her > mother had horns. If I bred her to > a bull with horns what will the > calf have? If I bred her to a bull > that is polled what will that calf > have? How do these genes work? Why > does my heifer have scurs? If she is homozygous polled, no matter what she is bred to she will have a polled calf. Ain't genetics fun? dunmovin farms [/QUOTE]
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