WBCS.LIVE practice question

In human genetics, the incredibly rare 'Bombay blood group' phenotype is clinically characterized by the absolute absence of which specific antigen?

Solve this multiple-choice question and check the correct answer with its explanation below.

Answer options

  1. A antigen
  2. B antigen
  3. D antigen
  4. H antigen

Correct answer and explanation

Correct answer: H antigen

Explanation: āœ… Correct Answer: D) H antigen šŸ“š Explanation: The Bombay blood group (Oh phenotype) is an incredibly rare and fascinating genetic trait first discovered in Bombay. Individuals with this type genetically completely lack the H antigen. Because the H antigen is the essential biological precursor for forming A and B antigens, these individuals heavily test as blood type O, but they can only safely receive blood from another Bombay phenotype donor.