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<blockquote data-quote="Mark Reynolds" data-source="post: 1823420" data-attributes="member: 43196"><p>If you know the bull is or conclude that he is a carrier, then potentially (50/50 chance) that each one of his offspring is a carrier. If you are retaining the offspring as breeding stock, then your breeding stock has a 50/50 chance of being a carrier. IF your breeding stock is a carrier and you mate it with a parent outside your herd of unknown genetic background and that parent happens to be a carrier (you don't know) you now have a recipe for a 25% chance of the calf produced from that pairing to be phenotypically defective, or dead. Do you want to take that chance? I did on a computer simulated project working on my Bachelor's degree from college 34 years ago. I still remember it. I ended up losing 5 of 47 calves to a resulting genetic defect. It didn't cost me monetarily then, but if I were to do that in real life, a loss of nearly 15% of my calf crop income, plus a year of cost feeding those now proven genetically defective cows (5 of them known, and an additional amount unknown if they are defective that didn't throw dead calves) would be financially devastating, even for a single calf season. Not worth the risk in my book.</p></blockquote><p></p>
[QUOTE="Mark Reynolds, post: 1823420, member: 43196"] If you know the bull is or conclude that he is a carrier, then potentially (50/50 chance) that each one of his offspring is a carrier. If you are retaining the offspring as breeding stock, then your breeding stock has a 50/50 chance of being a carrier. IF your breeding stock is a carrier and you mate it with a parent outside your herd of unknown genetic background and that parent happens to be a carrier (you don't know) you now have a recipe for a 25% chance of the calf produced from that pairing to be phenotypically defective, or dead. Do you want to take that chance? I did on a computer simulated project working on my Bachelor's degree from college 34 years ago. I still remember it. I ended up losing 5 of 47 calves to a resulting genetic defect. It didn't cost me monetarily then, but if I were to do that in real life, a loss of nearly 15% of my calf crop income, plus a year of cost feeding those now proven genetically defective cows (5 of them known, and an additional amount unknown if they are defective that didn't throw dead calves) would be financially devastating, even for a single calf season. Not worth the risk in my book. [/QUOTE]
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