Dr Simon Pheonix Sunday, March 16 · 7:00 AM · ▾ Exploring The Mysterious ORIGINS of RH-Negative Blood Type youtubeRH-negative comes from a broken RHD gene—specifically, a chunk of it gets deleted, so no D antigen shows up. You need two copies of this busted gene (one fro...unlikecommentstweet54 like this|. post
