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.
3 Fraternal twins are as genetically similar as any other siblings. Just as any brothers and sisters, fraternal twins will have about half of their genetic makeup in common. They will share about 50% of their DNA, the same as any siblings. Each individual receives half of their DNA from Mom's egg and half from Dad's sperm, and so any two offspring will have some overlapping qualities.