Can two B Positive make an O positive?
They are B blood type but can pass the O onto their kids. So two B parents can make an O child if both parents are BO. ... If mom passes her O and so does dad, then the child will be OO which is O type blood. Each parent has a 50% chance of passing down the O gene.
Can blood type A and B make O?
Two parents with A blood type can produce a child with either A or O blood types. Two parents with B blood type can produce a child with either B or O blood type. One parent with A and another with B can produce a child with A, B, AB or O blood types.