Short Answer
The Bombay Blood Group is rare because it is caused by an uncommon inherited genetic condition that occurs only when a person receives the rare hh gene from both parents.
Detailed Explanation
Most people inherit at least one gene that produces the H antigen, which forms the foundation of the ABO blood group system.
People with the Bombay Blood Group inherit two copies of the rare h gene (hh), preventing the production of the H antigen.
Since both parents must pass on this uncommon gene, the condition is extremely rare worldwide.
Key Points
- Caused by inheritance of the rare hh genotype.
- The H antigen is absent.
- Both parents must carry the rare gene.
- The condition is extremely uncommon.
❤️ Rare blood groups remind us that every donor matters. Your unique blood could become someone's miracle.
