> If you share none of your mother's DNA, the only possible explanation would be adoption. Not necessarily. There was a case where a DNA test of a woman's chil

> If you share none of your mother's DNA, the only possible explanation would be adoption. Not necessarily. There was a case where a DNA test of a woman's children showed that they did not share any of her DNA. Social Services was threatening to take them away from her. When she had another child, they court ordered an officer to be present during the birth and collect DNA from both of them at that time. Even still the DNA "proved" she was not the mother. It was only after another similar case was discovered that they were able to determine that she was a chimera, basically that she was her own twin, and had two different DNA strands. https://abcnews.go.com/Primetime/shes-twin/story?id=2315693 https://abcnews.go.com/Primetime/shes-twin/story?id=2315693