What's wrong with ancestry DNA tests? Two biological sisters are showing two different results? Is it a scam? Or inaccurate?

Question

I'm curious to know because both my aunties the half sisters of my father took a ancestry DNA test that both had different results. One of my aunties test result was only English and Irish and the other was Russian, German and middle eastern! Two completely different results from two biological sisters with the same parents! I know that my fathers mother side who was also the mother of my aunties was of English and Irish descent and his step father which was the father of my aunties is completely English. I would understand my father if he took a DNA test cause it would be completely different from there's cause his biological father was from the Balkans. But why would two full blooded sisters share no common results? Is it a scam?

Answer 1

not the real father ?

Answer 2

Giving your DNA to a corporation and giving them ownership forever is completely assinine.

Answer 3

I don t KNOW, MORON! Go reads a book too many big words for Christian and Billie Jonas #nightschool and #G.E.D.s MORONS, DUH!

Answer 4

Austosomal dna is in different percentages, however I do think it unusual for two sisters to have VERY differing results. Does the one with Russian and German have any British isles ancestry on her results as well? If there is none and you are pretty sure all grandparents and great grandparents are British/Irish, , I would write to ancestry.

Answer 5

Neither, you do not understand how DNA is passed from parents to children.

First you have two sets of DNA (Maternal & Paternal) this is passed in a random manner to each child. So one child may receive DNA that is actually from a Great Grandparent and another child may not. Also each company has its own data base created from the tests they have performed. It the same people have not been tested by all companies there will be differences.

Answer 6

DNA ancestry tests are for entertainment only and if they send in their DNA again say using a different name they will get different 'results' than the first time

Answer 7

Yes, siblings will be different unless it is for identical twins . They use the Autosomal DNA along with the X. 44 of your 46 chromosomes are Autosomal. It is the DNA that determines how you look genetically as well as alleles for health anomalies. You got it 50-50 from both parents but not normally 25% from each of your 4 grandparents. While you got 50% from your mother's side and 50% from your father's, there usually will be some bias in what you inherited from grandmother and grandfather on both sides of the family and how you inherited that bias will not be how your siblings inherited it unless you have an identical twin. You could have inherited anywhere from 0 to 50% from any one grandparent. The gap usually isn't that big but can be. You and your full siblings who are not identical twins got different chunks of DNA from your parents.



http://genetics.thetech.org/ask-a-geneticist/same-parents-different-ancestry



Also with this type of testing if you are tested by more than one company the results will vary as there are no Haplogroups with this type of testing. The only thing they can do is match you with population groups in their database and they each have their own database of population groups It has also been reported if you are tested by a company and go back sometime later and have them retest you by that time they have received more population groups that can alter your picture.

Answer 8

siblings have different percentages.