system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How can someone have 0% Irish in their DNA ancestry results if their biological mother shows 30% Irish ancestry?
gpt
Maybe think of it this way, as an analogy, not as science:  if you mother had a total of 100 genes, she would have 30 Irish and 70 non Irish.  She gives you 50. So all 50 could be non Irish. Or perhaps you were switched at birth.