Bulgaria PHP Group: Introduction to Design Patterns. Published on February 12, 2016 by Bill Sanders in Beginning PHP OOP, Design Patterns, Factory Method and Template Method.
The only way to have the same DNA of another person is if you and that other person came from the same sperm-egg combination (identical twins, triplets, etc, clones). They are still different though, but are good for organ transplants if you need one. Because your parents only pass on one allele for a specific trait.
Since mom's two X chromosomes can recombine, her sons and daughters will each get a mixed X from her. A brother and sister, then, would have about 50% of their maternal X DNA in common. The same is true for sisters. But sisters have another whole X from dad that's almost exactly the same. Of course, this is just one chromosome that is only about 5% of the total amount of DNA.