will brothers with the same father have matching dna
Best Answer: The chances of two brothers having the same DNA test result are 0.01% - have a look at the rest of the answer if you want to know how i worked this out. This of course is not the case if the brothers are identical. I think therefore it is highly unlikely that the other brother could be the father but it is still possible. Everyones DNA is actually pretty similar infact we have 99% of the same DNA as our closest ape relatives.