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Brother / Sister DNA ethnicity results?
If full siblings, one male the other female submit their DNA for ethnicity testing, how similar will the results be. The reason I ask is because there's Mitochondrial DNA which supposedly only women pass to their offspring. And then, there's the Y-DNA which men pass to their male offspring. If I understand things correctly.
2 Answers
- vballannieLv 44 years ago
These companies use the whole genome for ethnicity testing. Therefore full siblings will share, on average, 50% of their DNA. The mitochondrial and Y chromosomes are only a tiny fraction of all the cell's DNA. The mitochondrial DNA can give information on the maternal line for anyone (and is usually used for longer time scale comparisons than the chromosomal DNA). The Y chromosome can be used similarly, but only for males' paternal line. The specific results by country or region are using the chromosomal (minus the Y) DNA.
- 4 years ago
You understand well. You could have 0 similarity, you could have near exact same. It all depends on what happened when sperm met egg lol
