is nearby a genetic assessment that will positively determine partly siblings?

and would the results be admisable in court?is nearby a genetic assessment that will positively determine partly siblings?
Each father and mother donate partly of their DNA to their child, who is created from the combination of these halves. It is presumably conceivable then—although fantastically unlikely—that two children of one man could receive precisely different halves of that parent's DNA. In that case, however, if you have access to the parent in cross-question you could still easily determine their paternity or parenthood of each child, thus making the sibling relationship discernible. If you don't have access to the parent contained by common I suppose it could be a little more complex, but from reading around on the network a little, I'm pretty sure that you it wouldn't prove utterly difficult to establish the relationship. Logically, the more DNA you happened to share next to your sibling, the easier it would be to demonstrate the relationship.
Having said that, things can get even more interesting. Apparently mitochondrial DNA is passed down through the loving line and proving a relationship base on shared characteristics of mitochondrial DNA seems close to it would be very straightforward <i>as long as the common parent be the mother</i>.
I've found at least one site which seem to indicate that it's possible to work out half-sibling relationships through a genetic test, but they hold error rates and recommend bringing the potentially common parent if you hold access to them. They suggest as well that the oral exam has court weight, although unsurprisingly it might not constitute proof.
you could probably do paternity tests next to the parent that you share
DNA testing can determine if 2 siblings share equal father or mother. Birth records at the hospital can determine if same mother. Should be admissible.