DNA detective story calls into question the meaning of family and fatherhood
- When an at-home genetic test revealed Joel Gottfried did not have the same father as his sister, it set him on a personal quest to find out who his real dad was
- In his book Who’s My Daddy?, Gottfried tells of doggedly pursuing a scientific trail of DNA connections that left him appreciative of his unique life

A few years ago, Joel Gottfried began researching his family tree. He was in for a shock.
He had started with his father’s parents – Jews who fled hardship and persecution in Europe – and over time he managed to document, in minute detail, their arrival at the famous immigrant arrival point of Ellis Island in New York.
When Gottfried’s 69th birthday rolled around in March, 2018, his sister, Debbie Heller, ordered both of them an at-home genetic test from 23AndMe, so they could explore their genetic history together.
She thought it would be a fun gift. But instead, it revealed their lifelong belief that they shared biological parents was wrong. The DNA results instead showed they shared a mother, but they had different fathers.

“So who’s your daddy?” Gottfried asked his sister, stunned. To which she instantly replied: “Who’s your daddy?”