What blood type will a child have if one parent has type B blood and the other has type O blood?

A child born to a parent with blood type B and a parent with blood type O may have either blood type B or O. This is because blood type inheritance follows Mendel's laws of genetics and is determined by the genotypes of the parents. A person with blood type B may have the genotype BB or BO, while a person with blood type O can only have the genotype OO. When a parent with blood type B and a parent with blood type O have a child, their genes combine. If the parent with blood type B contributes a B gene and the parent with blood type O contributes an O gene, the child will have blood type B. If the parent with blood type B contributes an O gene (in the case of genotype BO) and the parent with blood type O also contributes an O gene, then the child will have blood type O. Therefore, a child born to parents with blood types B and O can only have blood type B or O.