about 1-4%.
Animal twins
Twins are common in many animal species, such as cats, sheep, ferrets and deer. The incidence of twinning among cattle is about 1-4%, and research is under way to improve the odds of twinning, which can be more profitable for the breeder if complications can be sidestepped or managed. The nine-banded armadillo (Dasypus novemcinctus) has identical twins (usually four babies) as its regular reproduction and not as exceptional cases.
Twin calves of the Hereford breed
I hope this can help you.
Women who are themselves fraternal twins have a 10% chance of producing twins, identical twin women have only a 0.6% probability of having a twin birth.
Identical twins happen by chance only; 4 per 1000 births or 0.004 probability. Fraternal twin probability is increased only if it is on the mother's side; so this does you affect your circumstance (from what you have stated). The chance of fraternal twins is 1 in 60 or 0.017. So, your probability of identical twins is 0.004 and fraternal twins is 0.017 (BTW, I have triplets).
1-.015 = .985
probability is used in genetics to determine the possibilities of offspring having a certain trait
1:1
Having twins is based on probability. There is not a 100% chance you will have twins.
Women who are themselves fraternal twins have a 10% chance of producing twins, identical twin women have only a 0.6% probability of having a twin birth.
1- P(identical) - P(fraternal) =1-0.004-0.023 =0.973 The probability of being a identical or fraternal twin plus the probability of not being a twin has to add to 1. so 1- probability of being twins=probability of not being a twin ;-)
Neither. Both calves will be fertile. You will only get a sterile female calf if she's born to a twin bull brother.
Identical twins happen by chance only; 4 per 1000 births or 0.004 probability. Fraternal twin probability is increased only if it is on the mother's side; so this does you affect your circumstance (from what you have stated). The chance of fraternal twins is 1 in 60 or 0.017. So, your probability of identical twins is 0.004 and fraternal twins is 0.017 (BTW, I have triplets).
Twin heifer calves being infertile is not a common occurrence. If they are healthy and growing normally, there should be no issues with their fertility. However, it's always best to consult with a veterinarian for a more accurate assessment.
P(twin)=P(identical)+P(fraternal) P(twin)=0.004 +0.023 P(twin)=0.027 [That's 27 out of 1,000 cases, or 54 persons out of 1027.]
It's rare, but possible, yes.
Twin female calves should be able to reproduce in the future, given they are otherwise healthy, normal calves. The main problem is if you get twins of different genders sharing the same blood supply during gestation. These are termed freemartins and the female has been exposed to male hormones throughout gestation. Besides looking a little 'manly', or having some physical similarities to a bull, they are almost always infertile and farmers will not attempt to mate them for this reason.
The current record is 39 calves.
how can you tell someone is having twin.
The female counterpart of a set of male-female twin calves has a 90% chance of being sterile or a non-breeder. When you have those high of chances for such cases, it is not recommended to keep that heifer for breeding purposes.