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Homozygous vs Homoblack
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<blockquote data-quote="Katpau" data-source="post: 1819455" data-attributes="member: 9933"><p>Since I was unfamiliar with the way the Black Hereford breed worked, I did an internet search and found this.</p><p><strong>"you get a Black Hereford by crossing a Red Polled Hereford with a Black Angus</strong>. in cattle black coat coloring is dominant and red coat color is recessive. So when u cross a Angus (BB) with a Polled Hereford (bb) for the first time your calf will be heterozygous (Bb) and will be black."</p><p></p><p>The bull you see listed is described as Homo Black (homozygous for the black gene BB), so all offspring will be black when bred to a red cow. If this Black Hereford was the result of <u>Polled</u> Herefords being bred to Black Angus (another polled breed), than the answer is, most likely yes and you should not have offspring with horns. But unless the bull was tested and found to be free of the horn gene, there is still some chance he is a carrier of the horn gene because a small percentage of Angus bulls are carriers and there is also a chance that what you see being called a Black Hereford bull, is actually a cross between a horned Hereford and a Black Angus which would make him a carrier of the horn gene. If the bull is a registered Black Hereford and not just a black baldy, I believe your chances are good that he is polled.</p></blockquote><p></p>
[QUOTE="Katpau, post: 1819455, member: 9933"] Since I was unfamiliar with the way the Black Hereford breed worked, I did an internet search and found this. [B]"you get a Black Hereford by crossing a Red Polled Hereford with a Black Angus[/B]. in cattle black coat coloring is dominant and red coat color is recessive. So when u cross a Angus (BB) with a Polled Hereford (bb) for the first time your calf will be heterozygous (Bb) and will be black." The bull you see listed is described as Homo Black (homozygous for the black gene BB), so all offspring will be black when bred to a red cow. If this Black Hereford was the result of [U]Polled[/U] Herefords being bred to Black Angus (another polled breed), than the answer is, most likely yes and you should not have offspring with horns. But unless the bull was tested and found to be free of the horn gene, there is still some chance he is a carrier of the horn gene because a small percentage of Angus bulls are carriers and there is also a chance that what you see being called a Black Hereford bull, is actually a cross between a horned Hereford and a Black Angus which would make him a carrier of the horn gene. If the bull is a registered Black Hereford and not just a black baldy, I believe your chances are good that he is polled. [/QUOTE]
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