If two parents whose blood types are both B produce a child that has blood type O, what can you say about the parents genotype?

Question

Cheeky

Biology

24 June, 05:28

If two parents whose blood types are both B produce a child that has blood type O, what can you say about the parents genotype?

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Sawyer Melton · Answer 1

Both parents would have to be heterozygous. Their genotypes would be either BO and BO, or IBi and IBi.

(Each parent has one B allele, and one O or 'no antigen' allele.)