I have never heard of the H-allele. Not sure if @Buttons840 has seen this but “It became a family joke because me and my siblings are all O blood type. If my d

I have never heard of the H-allele. Not sure if @Buttons840 has seen this but “It became a family joke because me and my siblings are all O blood type. If my dad really did have AB blood then we are not his children. The hospital later confirmed it was a mistake.” Thank you for the information as I always love learning more from the comments than the articles.