Home DNA AncestorMyHeritage: Why Brothers and Sisters Have Different DNA Test Results

8 thoughts on “MyHeritage: Why Brothers and Sisters Have Different DNA Test Results

  1. linda1541 says:

    I just read an interesting article that explains it well . You inherited 50% DNA from your mother and 50% DNA from your father. But your sister may not inherit the same 50% from each parent as you did. I find this all very interesting . The DNA from each parent is totally random.

  2. What kind of camera do you use?

  3. Candice says:

    Brothers hold the Paternal DNA (Fathers side), and Sisters hold the Maternal DNA (Mothers side), but all in all, we all hold the DNA of both sides, but it costs more to find out more of the results, of the opposite sides.

  4. Actually, ethnicity results are based on autosomal chromosomes, not sex chromosomes. The real reason why siblings receive different results is because DNA isn't passed down evenly between siblings

  5. Movie Buff says:

    This is where I found the 23 & Me test was useful because it gave the haplogroup & being male you get to see both the Y-DNA & mt-DNA.

  6. You should take the same DNA test as your sister. It’s my understanding that test results from different companies can vary. This way you compare apples to apples. Just my humble opinion.

  7. Greetings Nick. A sibling having different results from another sibling has nothing to do with the sex chromosomes as what some viewers think. Autosomal tests including the big vendors (e.g., 23 and me, Ancestry DNA) provides information regarding ancestry from both parents and after the first generation, it is completely random. So, if someone has mixed ancestry, two siblings (regardless if there are brother/sister, sister/sister) will likely have different results because of the randomness of genetic inheritance. Moreover, even though children inherit 50% from each parent, you don’t know what exactly 50% of ancestry you’re are inheriting from each parent. Also, it is not strange to see a parent have a genetic cousin match and this cousin match does not match the child. All this means is that the child did not inherit DNA from the common ancestor but the cousin is still family from a genealogical perspective.

  8. I hope your father got his results. I'm really curious for some reason.

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