🩸 The Mystery of the "Fake" O Blood Type! 🩸 Ever come across a pedigree chart where two "O" type parents have an "A" type child? 🤯 Before you call it a lab error, check for the Bombay Phenotype! This is one of the most fascinating concepts in genetics (and a favorite trick question in CSIR NET & GATE exams!). 🧬 The Science in a Nutshell: Normally, the H-Antigen acts as the foundation for A and B sugars to attach to the red blood cell. Normal Scenario: H-substance is present ➡️ A or B sugars