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Offline Show Time King

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I was wondering?
« on: September 06, 2007, 09:50:15 PM »
Okay my question is that I have 2 show heifers, one is a Paddy O'malley calve and one is a Almost famous calve Paddy is a PH carrier and Almost is a TH carrier but both dams are limi angus cows so what are the odds of me having Ph or Th positive calves?

Offline Zach

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Re: I was wondering?
« Reply #1 on: September 06, 2007, 09:52:50 PM »
you mean having carrier heifers or the heifers calves?
The livestock (show) industry is a tough one- if you've never had anything worth a damn you might as well go on the internet and rundown everybody you can.

Offline red

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Re: I was wondering?
« Reply #2 on: September 07, 2007, 06:18:15 AM »
you have a 50% chance of a carrier.

Red
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Offline DL

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Re: I was wondering?
« Reply #3 on: September 07, 2007, 09:04:59 AM »
If you mate a carrier of a recessive defect (ie PHA or TH) to a carrier for the same defect you have a 50% risk with each mating that the offspring will be a carrier.

If you mate a carrier of a recessive defect (ie PHA or TH) to a clean animal you have a 50% risk with each mating that the offspring will be a carrier.

The big difference is that mating carrier to carrier also gives you a 25% risk of having a dead calf with each mating (and a 25% rsik of having a "normal" calf), while mating a carrier to a clean gives you a 50% risk of having a carrier and a 50% risk of having a clean calf.

It is like tossing a coin - if it comes up heads or tails on toss ten doesn't have anything to do with what it did on toss 9.

So for you heifers there is a 50% chance that they are carriers and a 50% chance that they aren't. Hope that helps - good luck
;)

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