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.
Culturally they may each say they are â1/8th Cherokeeâ but at the DNA level, one may have no Cherokee DNA at all. So yes, it is definitely possible for two siblings to get pretty different ancestry results from a DNA test. Even when they share the same parents.