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- Thread starter TottenClubCalves
- Start date

you mean having carrier heifers or the heifers calves?

you have a 50% chance of a carrier.

Red

Red

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