Blood type has nothing to do with fertility, personality, what food you can eat or who you can marry. Blood type only matters in blood transfusions or when a Rhesus negative mother is pregnant with a Rhesus positive child. read more
Yes. People of any 2 blood types can have children. Their child has a 87.89% chance of having blood type B+, a 5.86% chance of having blood type B-, a 5.86% chance of having blood type O+, and a 0.39% chance of having blood type O-. read more
The A and B are dominant, and O is recessive. So allele A combined with allele O is type A. Similarly, BO is type B, AA is type A, BB is type B, OO is type O, and AB is type AB. If both parents have type A blood, then the alleles could be AA or AO, thus the allele A frequency is 75%, allele O frequency is 25% for both parents. read more