The Reconstruction implemented by Congress, which lasted from 1866 to 1877, was aimed at reorganizing the Southern states after the Civil War, providing the means for readmitting them into the Union, and defining the means by which whites and blacks could live together in a nonslave society.
Private Knowledge DNA Sibling Test starting at $150 and Legally Admissible DNA Sibling Test starting at $255. Analysis of the DNA of two separate individuals can provide information as to whether they are full siblings, half siblings, or not related.
If two brothers happen to share markers at all of the sites tested, then the wrong man can be identified as the dad. But again, unless they are identical twins, the brothers will not match up at every DNA position. If a company looks at enough DNA, they will be able to tell who the dad is. And a company will do this if you tell them that either brother might be the dad.