Good morning, Class. PLEASE, NOTE THAT THE AA USED IN THIS LECTURE IS NOT THE HEMOGLOBIN GENOTYPE ARE TALKING ABOUT. THERE IS BLOOD GROUP A (AA or AO) and there are also hemoglobin genotypes AA, AS, SS, etc. Don't confuse the two.🙏 #bloodgroups #genotype #familyproblems #sabidoctor #asksabidr