Answer: Type O + can help a person with an A+ blood type because the Rh factors are the same.
Explanation:
The geneotype of O blood is a recessive oo. It has both type A and B antibodies, but does not have any antigens. This means it will not interact negatively with A or B antigens. Whereas type A antigens cannot interact with type B antigens and vice versa. Type O negative blood is a universal donor and can be used with any blood type. If a person has a positive blood type, O positive can be used as well. Since nearly 80% of the world's population is a positive blood type, there is a good chance this O positive man can help.