EWTN Catholic Q&A
Jesus--True God, and True Man
Question from David McMahon on 12-02-2012:

Did Jesus share Mary's DNA?

Answer by Richard Geraghty on 12-04-2012:

Dear David,

God became a man when he was conceived by the Holy Spirit in the womb of the Blessed Virgin Mary. It follows that her Son had here DNA. She was the mother after all.

Dr. Geraghty