Multiple alleles - ABO blood groups

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2026 Re-NEET 1 question

  1. For a person with blood group 'O', which of the following is not a possible combination of parents' blood group genotypes?

2019 Odisha 1 question

  1. In a marriage between male with blood group A and female with blood group B, the progeny had either blood group AB or B. What could be the possible genotype of parents?