Same-sex marriage, also known as gay marriage, is marriage between people of the same sex, either as a secular civil ceremony or in a religious setting. Same-sex unions are recorded in the history of a number of cultures, but marriage or similarly formalized same-sex unions were rare or nonexistent in other cultures.
DNA between siblings are similar if you share the same biological parents. The genetic information you gain comes from both of your parents, and are a result of fertilization of 2 haploid cells fusing to form a zygote that has a diploid number of chromosomes.
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.